fix: ranking API 필수 파라미터 KEYB 추가 및 GUBN 값 수정 (#258)

KIS 공식 문서(20260221) 기준 KEYB(NEXT KEY BUFF)는 Required=Y이나
누락되어 있어 항상 rt_cd=2 오류 발생, fallback 경로로만 실행됨.

- fluctuation/volume 양쪽 params에 KEYB: '' 추가
- GUBN 주석 수정: 0=하락율, 1=상승율 (문서 기준)
- GUBN 값 0→1 수정: 상승율 기준으로 변동성 급등 종목 스캔

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/run_overnight.sh

@@ -23,7 +23,7 @@ if [ -z "${APP_CMD:-}" ]; then
 
     dashboard_port="${DASHBOARD_PORT:-8080}"
 
-    APP_CMD="DASHBOARD_PORT=$dashboard_port $PYTHON_BIN -m src.main --mode=paper --dashboard"
+    APP_CMD="DASHBOARD_PORT=$dashboard_port $PYTHON_BIN -m src.main --mode=live --dashboard"
 fi
 
 mkdir -p "$LOG_DIR"

src/broker/overseas.py

@@ -121,6 +121,7 @@ class OverseasBroker:
             tr_id = self._broker._settings.OVERSEAS_RANKING_VOLUME_TR_ID
             path = self._broker._settings.OVERSEAS_RANKING_VOLUME_PATH
             params: dict[str, str] = {
+                "KEYB": "",  # NEXT KEY BUFF — Required, 공백
                 "AUTH": "",
                 "EXCD": ranking_excd,
                 "MIXN": "0",
@@ -130,10 +131,11 @@ class OverseasBroker:
             tr_id = self._broker._settings.OVERSEAS_RANKING_FLUCT_TR_ID
             path = self._broker._settings.OVERSEAS_RANKING_FLUCT_PATH
             params = {
+                "KEYB": "",  # NEXT KEY BUFF — Required, 공백
                 "AUTH": "",
                 "EXCD": ranking_excd,
                 "NDAY": "0",
-                "GUBN": "0",  # 0=전체(상승+하락), 1=상승만 — 변동성 스캐너는 전체 필요
+                "GUBN": "1",  # 0=하락율, 1=상승율 — 변동성 스캐너는 급등 종목 우선
                 "VOL_RANG": "0",
             }
 

src/main.py

@@ -730,7 +730,7 @@ async def trading_cycle(
         open_position = get_open_position(db_conn, stock_code, market.code)
         if open_position:
             entry_price = safe_float(open_position.get("price"), 0.0)
-            if entry_price > 0:
+            if entry_price > 0 and current_price > 0:
                 loss_pct = (current_price - entry_price) / entry_price * 100
                 stop_loss_threshold = -2.0
                 take_profit_threshold = 3.0
@@ -925,10 +925,13 @@ async def trading_cycle(
             # - SELL: -0.2% below last price — ensures fill even when price dips slightly
             #   (placing at exact last price risks no-fill if the bid is just below).
             overseas_price: float
+            # KIS requires at most 2 decimal places for prices >= $1 (≥1달러 소수점 2자리 제한).
+            # Penny stocks (< $1) keep 4 decimal places to preserve price precision.
+            _price_decimals = 2 if current_price >= 1.0 else 4
             if decision.action == "BUY":
-                overseas_price = round(current_price * 1.002, 4)
+                overseas_price = round(current_price * 1.002, _price_decimals)
             else:
-                overseas_price = round(current_price * 0.998, 4)
+                overseas_price = round(current_price * 0.998, _price_decimals)
             result = await overseas_broker.send_overseas_order(
                 exchange_code=market.exchange_code,
                 stock_code=stock_code,

src/strategies/v20260220_210124_evolved.py

@@ -1,114 +0,0 @@
-"""Auto-generated strategy: v20260220_210124
-
-Generated at: 2026-02-20T21:01:24.706847+00:00
-Rationale: Auto-evolved from 6 failures. Primary failure markets: ['US_AMEX', 'US_NYSE', 'US_NASDAQ']. Average loss: -194.69
-"""
-
-from __future__ import annotations
-from typing import Any
-from src.strategies.base import BaseStrategy
-
-
-class Strategy_v20260220_210124(BaseStrategy):
-    """Strategy: v20260220_210124"""
-
-    def evaluate(self, market_data: dict[str, Any]) -> dict[str, Any]:
-        import datetime
-
-        # --- Strategy Constants ---
-        # Minimum price for a stock to be considered for trading (avoids penny stocks)
-        MIN_PRICE = 5.0
-
-        # Momentum signal thresholds (stricter than previous failures)
-        MOMENTUM_PRICE_CHANGE_THRESHOLD = 7.0  # % price change
-        MOMENTUM_VOLUME_RATIO_THRESHOLD = 4.0  # X times average volume
-
-        # Oversold signal thresholds (more conservative)
-        OVERSOLD_RSI_THRESHOLD = 25.0  # RSI value (lower means more oversold)
-
-        # Confidence levels
-        CONFIDENCE_HOLD = 30
-        CONFIDENCE_BUY_OVERSOLD = 65
-        CONFIDENCE_BUY_MOMENTUM = 85
-        CONFIDENCE_BUY_STRONG_MOMENTUM = 90  # For higher-priced stocks with strong momentum
-
-        # Market hours in UTC (9:30 AM ET to 4:00 PM ET)
-        MARKET_OPEN_UTC = datetime.time(14, 30)
-        MARKET_CLOSE_UTC = datetime.time(21, 0)
-
-        # Volatile periods within market hours (UTC) to avoid
-        # First hour after open (14:30 UTC - 15:30 UTC)
-        VOLATILE_OPEN_END_UTC = datetime.time(15, 30)
-        # Last 30 minutes before close (20:30 UTC - 21:00 UTC)
-        VOLATILE_CLOSE_START_UTC = datetime.time(20, 30)
-
-        current_price = market_data.get('current_price')
-        price_change_pct = market_data.get('price_change_pct')
-        volume_ratio = market_data.get('volume_ratio')  # Assumed pre-computed indicator
-        rsi = market_data.get('rsi')                    # Assumed pre-computed indicator
-        timestamp_str = market_data.get('timestamp')
-
-        action = "HOLD"
-        confidence = CONFIDENCE_HOLD
-        rationale = "Initial HOLD: No clear signal or conditions not met."
-
-        # --- 1. Basic Data Validation ---
-        if current_price is None or price_change_pct is None:
-            return {"action": "HOLD", "confidence": CONFIDENCE_HOLD,
-                    "rationale": "Insufficient core data (price or price change) to evaluate."}
-
-        # --- 2. Price Filter: Avoid low-priced/penny stocks ---
-        if current_price < MIN_PRICE:
-            return {"action": "HOLD", "confidence": CONFIDENCE_HOLD,
-                    "rationale": f"Avoiding low-priced stock (${current_price:.2f} < ${MIN_PRICE:.2f})."}
-
-        # --- 3. Time Filter: Only trade during core market hours ---
-        if timestamp_str:
-            try:
-                dt_object = datetime.datetime.fromisoformat(timestamp_str)
-                current_time_utc = dt_object.time()
-
-                if not (MARKET_OPEN_UTC <= current_time_utc < MARKET_CLOSE_UTC):
-                    return {"action": "HOLD", "confidence": CONFIDENCE_HOLD,
-                            "rationale": f"Avoiding trade outside core market hours ({current_time_utc} UTC)."}
-
-                if (MARKET_OPEN_UTC <= current_time_utc < VOLATILE_OPEN_END_UTC) or \
-                   (VOLATILE_CLOSE_START_UTC <= current_time_utc < MARKET_CLOSE_UTC):
-                    return {"action": "HOLD", "confidence": CONFIDENCE_HOLD,
-                            "rationale": f"Avoiding trade during volatile market open/close periods ({current_time_utc} UTC)."}
-
-            except ValueError:
-                rationale += " (Warning: Malformed timestamp, time filters skipped)"
-
-        # --- Initialize signal states ---
-        has_momentum_buy_signal = False
-        has_oversold_buy_signal = False
-
-        # --- 4. Evaluate Enhanced Buy Signals ---
-
-        # Momentum Buy Signal
-        if volume_ratio is not None and \
-           price_change_pct > MOMENTUM_PRICE_CHANGE_THRESHOLD and \
-           volume_ratio > MOMENTUM_VOLUME_RATIO_THRESHOLD:
-            has_momentum_buy_signal = True
-            rationale = f"Momentum BUY: Price change {price_change_pct:.2f}%, Volume {volume_ratio:.2f}x."
-            confidence = CONFIDENCE_BUY_MOMENTUM
-            if current_price >= 10.0:
-                confidence = CONFIDENCE_BUY_STRONG_MOMENTUM
-
-        # Oversold Buy Signal
-        if rsi is not None and rsi < OVERSOLD_RSI_THRESHOLD:
-            has_oversold_buy_signal = True
-            if not has_momentum_buy_signal:
-                rationale = f"Oversold BUY: RSI {rsi:.2f}."
-                confidence = CONFIDENCE_BUY_OVERSOLD
-                if current_price >= 10.0:
-                    confidence = min(CONFIDENCE_BUY_OVERSOLD + 5, 80)
-
-        # --- 5. Decision Logic ---
-        if has_momentum_buy_signal:
-            action = "BUY"
-        elif has_oversold_buy_signal:
-            action = "BUY"
-
-        return {"action": action, "confidence": confidence, "rationale": rationale}

src/strategies/v20260220_210159_evolved.py

@@ -1,97 +0,0 @@
-"""Auto-generated strategy: v20260220_210159
-
-Generated at: 2026-02-20T21:01:59.391523+00:00
-Rationale: Auto-evolved from 6 failures. Primary failure markets: ['US_AMEX', 'US_NYSE', 'US_NASDAQ']. Average loss: -194.69
-"""
-
-from __future__ import annotations
-from typing import Any
-from src.strategies.base import BaseStrategy
-
-
-class Strategy_v20260220_210159(BaseStrategy):
-    """Strategy: v20260220_210159"""
-
-    def evaluate(self, market_data: dict[str, Any]) -> dict[str, Any]:
-        import datetime
-
-        current_price = market_data.get('current_price')
-        price_change_pct = market_data.get('price_change_pct')
-        volume_ratio = market_data.get('volume_ratio')
-        rsi = market_data.get('rsi')
-        timestamp_str = market_data.get('timestamp')
-        market_name = market_data.get('market')
-
-        # Default action
-        action = "HOLD"
-        confidence = 0
-        rationale = "No strong signal or conditions not met."
-
-        # --- FAILURE PATTERN AVOIDANCE ---
-
-        # 1. Avoid low-priced/penny stocks
-        MIN_PRICE_THRESHOLD = 5.0  # USD
-        if current_price is not None and current_price < MIN_PRICE_THRESHOLD:
-            rationale = (
-                f"HOLD: Stock price (${current_price:.2f}) is below minimum threshold "
-                f"(${MIN_PRICE_THRESHOLD:.2f}). Past failures consistently involved low-priced stocks."
-            )
-            return {"action": action, "confidence": confidence, "rationale": rationale}
-
-        # 2. Avoid early market hour volatility
-        if timestamp_str:
-            try:
-                dt_obj = datetime.datetime.fromisoformat(timestamp_str)
-                utc_hour = dt_obj.hour
-                utc_minute = dt_obj.minute
-
-                if (utc_hour == 14 and utc_minute < 45) or (utc_hour == 13 and utc_minute >= 30):
-                    rationale = (
-                        f"HOLD: Trading during early market hours (UTC {utc_hour}:{utc_minute}), "
-                        f"a period identified with past failures due to high volatility."
-                    )
-                    return {"action": action, "confidence": confidence, "rationale": rationale}
-            except ValueError:
-                pass
-
-        # --- IMPROVED BUY STRATEGY ---
-
-        # Momentum BUY signal
-        if volume_ratio is not None and price_change_pct is not None:
-            if price_change_pct > 7.0 and volume_ratio > 3.0:
-                action = "BUY"
-                confidence = 70
-                rationale = "Improved BUY: Momentum signal with high volume and above price threshold."
-
-                if market_name == 'US_AMEX':
-                    confidence = max(55, confidence - 5)
-                    rationale += " (Adjusted lower for AMEX market's higher risk profile)."
-                elif market_name == 'US_NASDAQ' and price_change_pct > 20:
-                    confidence = max(50, confidence - 10)
-                    rationale += " (Adjusted lower for aggressive NASDAQ momentum volatility)."
-
-                if price_change_pct > 15.0:
-                    confidence = max(50, confidence - 5)
-                    rationale += " (Caution: Very high daily price change, potential for reversal)."
-
-                return {"action": action, "confidence": confidence, "rationale": rationale}
-
-        # Oversold BUY signal
-        if rsi is not None and price_change_pct is not None:
-            if rsi < 30 and price_change_pct < -3.0:
-                action = "BUY"
-                confidence = 65
-                rationale = "Improved BUY: Oversold signal with recent decline and above price threshold."
-
-                if market_name == 'US_AMEX':
-                    confidence = max(50, confidence - 5)
-                    rationale += " (Adjusted lower for AMEX market's higher risk on oversold assets)."
-
-                if price_change_pct < -10.0:
-                    confidence = max(45, confidence - 10)
-                    rationale += " (Caution: Very steep decline, potential falling knife)."
-
-                return {"action": action, "confidence": confidence, "rationale": rationale}
-
-        # If no specific BUY signal, default to HOLD
-        return {"action": action, "confidence": confidence, "rationale": rationale}

src/strategies/v20260220_210244_evolved.py

@@ -1,88 +0,0 @@
-"""Auto-generated strategy: v20260220_210244
-
-Generated at: 2026-02-20T21:02:44.387355+00:00
-Rationale: Auto-evolved from 6 failures. Primary failure markets: ['US_AMEX', 'US_NYSE', 'US_NASDAQ']. Average loss: -194.69
-"""
-
-from __future__ import annotations
-from typing import Any
-from src.strategies.base import BaseStrategy
-
-
-class Strategy_v20260220_210244(BaseStrategy):
-    """Strategy: v20260220_210244"""
-
-    def evaluate(self, market_data: dict[str, Any]) -> dict[str, Any]:
-        from datetime import datetime
-
-        # Extract required data points safely
-        current_price = market_data.get("current_price")
-        price_change_pct = market_data.get("price_change_pct")
-        volume_ratio = market_data.get("volume_ratio")
-        rsi = market_data.get("rsi")
-        timestamp_str = market_data.get("timestamp")
-        market_name = market_data.get("market")
-        stock_code = market_data.get("stock_code", "UNKNOWN")
-
-        # Default action is HOLD with conservative confidence and rationale
-        action = "HOLD"
-        confidence = 50
-        rationale = f"No strong BUY signal for {stock_code} or awaiting more favorable conditions after avoiding known failure patterns."
-
-        # --- 1. Failure Pattern Avoidance Filters ---
-
-        # A. Avoid low-priced (penny) stocks
-        if current_price is not None and current_price < 5.0:
-            return {
-                "action": "HOLD",
-                "confidence": 50,
-                "rationale": f"AVOID {stock_code}: Stock price (${current_price:.2f}) is below minimum threshold ($5.00) for BUY action. Identified past failures on highly volatile, low-priced stocks."
-            }
-
-        # B. Avoid initiating BUY trades during identified high-volatility hours
-        if timestamp_str:
-            try:
-                trade_hour = datetime.fromisoformat(timestamp_str).hour
-                if trade_hour in [14, 20]:
-                    return {
-                        "action": "HOLD",
-                        "confidence": 50,
-                        "rationale": f"AVOID {stock_code}: Trading during historically volatile hour ({trade_hour} UTC) where previous BUYs resulted in losses. Prefer to observe market stability."
-                    }
-            except ValueError:
-                pass
-
-        # C. Be cautious with extreme momentum spikes
-        if volume_ratio is not None and price_change_pct is not None:
-            if volume_ratio >= 9.0 and price_change_pct >= 15.0:
-                return {
-                    "action": "HOLD",
-                    "confidence": 50,
-                    "rationale": f"AVOID {stock_code}: Extreme short-term momentum detected (price change: +{price_change_pct:.2f}%, volume ratio: {volume_ratio:.1f}x). Historical failures indicate buying into such rapid spikes often leads to reversals."
-                }
-
-        # D. Be cautious with "oversold" signals without further confirmation
-        if rsi is not None and rsi < 30:
-            return {
-                "action": "HOLD",
-                "confidence": 50,
-                "rationale": f"AVOID {stock_code}: Oversold signal (RSI={rsi:.1f}) detected. While often a BUY signal, historical failures on similar 'oversold' trades suggest waiting for stronger confirmation."
-            }
-
-        # --- 2. Improved BUY Signal Generation ---
-        if volume_ratio is not None and 2.0 <= volume_ratio < 9.0 and \
-           price_change_pct is not None and 2.0 <= price_change_pct < 15.0:
-
-            action = "BUY"
-            confidence = 70
-            rationale = f"BUY {stock_code}: Moderate momentum detected (price change: +{price_change_pct:.2f}%, volume ratio: {volume_ratio:.1f}x). Passed filters for price and extreme momentum, avoiding past failure patterns."
-
-            if market_name in ["US_AMEX", "US_NASDAQ"]:
-                confidence = max(60, confidence - 5)
-                rationale += f" Adjusted confidence for {market_name} market characteristics."
-            elif market_name == "US_NYSE":
-                confidence = max(65, confidence)
-
-            confidence = max(50, min(85, confidence))
-
-        return {"action": action, "confidence": confidence, "rationale": rationale}

tests/test_main.py

@@ -1246,7 +1246,8 @@ class TestOverseasBalanceParsing:
         mock_overseas_broker_with_buy_scenario.send_overseas_order.assert_called_once()
         call_kwargs = mock_overseas_broker_with_buy_scenario.send_overseas_order.call_args
         sent_price = call_kwargs[1].get("price") or call_kwargs[0][4]
-        expected_price = round(182.5 * 1.002, 4)  # 0.2% premium for BUY limit orders
+        # KIS requires max 2 decimal places for prices >= $1 (#252)
+        expected_price = round(182.5 * 1.002, 2)  # 0.2% premium for BUY limit orders
         assert sent_price == expected_price, (
             f"Expected limit price {expected_price} (182.5 * 1.002) but got {sent_price}. "
             "BUY uses +0.2% to improve fill rate while minimising overpayment (#211)."
@@ -1325,12 +1326,133 @@ class TestOverseasBalanceParsing:
         overseas_broker.send_overseas_order.assert_called_once()
         call_kwargs = overseas_broker.send_overseas_order.call_args
         sent_price = call_kwargs[1].get("price") or call_kwargs[0][4]
-        expected_price = round(sell_price * 0.998, 4)  # -0.2% for SELL limit orders
+        # KIS requires max 2 decimal places for prices >= $1 (#252)
+        expected_price = round(sell_price * 0.998, 2)  # -0.2% for SELL limit orders
         assert sent_price == expected_price, (
             f"Expected SELL limit price {expected_price} (182.5 * 0.998) but got {sent_price}. "
             "SELL uses -0.2% to ensure fill even when price dips slightly (#211)."
         )
 
+    @pytest.mark.asyncio
+    async def test_overseas_buy_price_rounded_to_2_decimals_for_dollar_plus_stock(
+        self,
+        mock_domestic_broker: MagicMock,
+        mock_playbook: DayPlaybook,
+        mock_risk: MagicMock,
+        mock_db: MagicMock,
+        mock_decision_logger: MagicMock,
+        mock_context_store: MagicMock,
+        mock_criticality_assessor: MagicMock,
+        mock_telegram: MagicMock,
+        mock_overseas_market: MagicMock,
+    ) -> None:
+        """BUY price for $1+ stocks is rounded to 2 decimal places (issue #252).
+
+        KIS rejects prices with more than 2 decimal places for stocks priced >= $1.
+        current_price=50.1234 * 1.002 = 50.22... should be sent as 50.22, not 50.2236.
+        """
+        overseas_broker = MagicMock()
+        overseas_broker.get_overseas_balance = AsyncMock(
+            return_value={
+                "output1": [],
+                "output2": [{"frcr_evlu_tota": "0", "frcr_dncl_amt_2": "10000", "frcr_buy_amt_smtl": "0"}],
+            }
+        )
+        overseas_broker.get_overseas_price = AsyncMock(
+            return_value={"output": {"last": "50.1234", "rate": "0"}}
+        )
+        overseas_broker.send_overseas_order = AsyncMock(
+            return_value={"rt_cd": None, "msg1": "주문접수"}
+        )
+
+        db_conn = init_db(":memory:")
+        decision_logger = DecisionLogger(db_conn)
+
+        engine = MagicMock(spec=ScenarioEngine)
+        engine.evaluate = MagicMock(return_value=_make_buy_match())
+
+        await trading_cycle(
+            broker=mock_domestic_broker,
+            overseas_broker=overseas_broker,
+            scenario_engine=engine,
+            playbook=mock_playbook,
+            risk=mock_risk,
+            db_conn=db_conn,
+            decision_logger=decision_logger,
+            context_store=mock_context_store,
+            criticality_assessor=mock_criticality_assessor,
+            telegram=mock_telegram,
+            market=mock_overseas_market,
+            stock_code="TQQQ",
+            scan_candidates={},
+        )
+
+        overseas_broker.send_overseas_order.assert_called_once()
+        sent_price = overseas_broker.send_overseas_order.call_args[1].get("price") or \
+            overseas_broker.send_overseas_order.call_args[0][4]
+        # 50.1234 * 1.002 = 50.2235... rounded to 2 decimals = 50.22
+        assert sent_price == round(50.1234 * 1.002, 2), (
+            f"Expected 2-decimal price {round(50.1234 * 1.002, 2)} but got {sent_price} (#252)"
+        )
+
+    @pytest.mark.asyncio
+    async def test_overseas_penny_stock_price_keeps_4_decimals(
+        self,
+        mock_domestic_broker: MagicMock,
+        mock_playbook: DayPlaybook,
+        mock_risk: MagicMock,
+        mock_db: MagicMock,
+        mock_decision_logger: MagicMock,
+        mock_context_store: MagicMock,
+        mock_criticality_assessor: MagicMock,
+        mock_telegram: MagicMock,
+        mock_overseas_market: MagicMock,
+    ) -> None:
+        """BUY price for penny stocks (< $1) uses 4 decimal places (issue #252)."""
+        overseas_broker = MagicMock()
+        overseas_broker.get_overseas_balance = AsyncMock(
+            return_value={
+                "output1": [],
+                "output2": [{"frcr_evlu_tota": "0", "frcr_dncl_amt_2": "10000", "frcr_buy_amt_smtl": "0"}],
+            }
+        )
+        overseas_broker.get_overseas_price = AsyncMock(
+            return_value={"output": {"last": "0.5678", "rate": "0"}}
+        )
+        overseas_broker.send_overseas_order = AsyncMock(
+            return_value={"rt_cd": None, "msg1": "주문접수"}
+        )
+
+        db_conn = init_db(":memory:")
+        decision_logger = DecisionLogger(db_conn)
+
+        engine = MagicMock(spec=ScenarioEngine)
+        engine.evaluate = MagicMock(return_value=_make_buy_match())
+
+        await trading_cycle(
+            broker=mock_domestic_broker,
+            overseas_broker=overseas_broker,
+            scenario_engine=engine,
+            playbook=mock_playbook,
+            risk=mock_risk,
+            db_conn=db_conn,
+            decision_logger=decision_logger,
+            context_store=mock_context_store,
+            criticality_assessor=mock_criticality_assessor,
+            telegram=mock_telegram,
+            market=mock_overseas_market,
+            stock_code="PENNYX",
+            scan_candidates={},
+        )
+
+        overseas_broker.send_overseas_order.assert_called_once()
+        sent_price = overseas_broker.send_overseas_order.call_args[1].get("price") or \
+            overseas_broker.send_overseas_order.call_args[0][4]
+        # 0.5678 * 1.002 = 0.56893... rounded to 4 decimals = 0.5689
+        assert sent_price == round(0.5678 * 1.002, 4), (
+            f"Expected 4-decimal price {round(0.5678 * 1.002, 4)} but got {sent_price} (#252)"
+        )
+
 
 class TestScenarioEngineIntegration:
     """Test scenario engine integration in trading_cycle."""
@@ -2124,6 +2246,92 @@ async def test_hold_not_overridden_when_between_stop_loss_and_take_profit() -> N
     broker.send_order.assert_not_called()
 
 
+@pytest.mark.asyncio
+async def test_stop_loss_not_triggered_when_current_price_is_zero() -> None:
+    """HOLD must stay HOLD when current_price=0 even if entry_price is set (issue #251).
+
+    A price API failure that returns 0.0 must not cause a false -100% stop-loss.
+    """
+    db_conn = init_db(":memory:")
+    decision_logger = DecisionLogger(db_conn)
+
+    buy_decision_id = decision_logger.log_decision(
+        stock_code="005930",
+        market="KR",
+        exchange_code="KRX",
+        action="BUY",
+        confidence=90,
+        rationale="entry",
+        context_snapshot={},
+        input_data={},
+    )
+    log_trade(
+        conn=db_conn,
+        stock_code="005930",
+        action="BUY",
+        confidence=90,
+        rationale="entry",
+        quantity=1,
+        price=100.0,  # valid entry price
+        market="KR",
+        exchange_code="KRX",
+        decision_id=buy_decision_id,
+    )
+
+    broker = MagicMock()
+    # Price API returns 0.0 — simulates API failure or pre-market unavailability
+    broker.get_current_price = AsyncMock(return_value=(0.0, 0.0, 0.0))
+    broker.get_balance = AsyncMock(
+        return_value={
+            "output2": [
+                {
+                    "tot_evlu_amt": "100000",
+                    "dnca_tot_amt": "10000",
+                    "pchs_amt_smtl_amt": "90000",
+                }
+            ]
+        }
+    )
+    broker.send_order = AsyncMock(return_value={"msg1": "OK"})
+
+    market = MagicMock()
+    market.name = "Korea"
+    market.code = "KR"
+    market.exchange_code = "KRX"
+    market.is_domestic = True
+
+    telegram = MagicMock()
+    telegram.notify_trade_execution = AsyncMock()
+    telegram.notify_fat_finger = AsyncMock()
+    telegram.notify_circuit_breaker = AsyncMock()
+    telegram.notify_scenario_matched = AsyncMock()
+
+    await trading_cycle(
+        broker=broker,
+        overseas_broker=MagicMock(),
+        scenario_engine=MagicMock(evaluate=MagicMock(return_value=_make_hold_match())),
+        playbook=_make_playbook("KR"),
+        risk=MagicMock(),
+        db_conn=db_conn,
+        decision_logger=decision_logger,
+        context_store=MagicMock(
+            get_latest_timeframe=MagicMock(return_value=None),
+            set_context=MagicMock(),
+        ),
+        criticality_assessor=MagicMock(
+            assess_market_conditions=MagicMock(return_value=MagicMock(value="NORMAL")),
+            get_timeout=MagicMock(return_value=5.0),
+        ),
+        telegram=telegram,
+        market=market,
+        stock_code="005930",
+        scan_candidates={},
+    )
+
+    # No SELL order must be placed — current_price=0 must suppress stop-loss
+    broker.send_order.assert_not_called()
+
+
 @pytest.mark.asyncio
 async def test_sell_order_uses_broker_balance_qty_not_db() -> None:
     """SELL quantity must come from broker balance output1, not DB.

tests/test_overseas_broker.py

@@ -122,9 +122,10 @@ class TestFetchOverseasRankings:
         params = call_args[1]["params"]
 
         assert "/uapi/overseas-stock/v1/ranking/updown-rate" in url
+        assert params["KEYB"] == ""  # Required by KIS API spec
         assert params["EXCD"] == "NAS"
         assert params["NDAY"] == "0"
-        assert params["GUBN"] == "0"  # 0=전체(상승+하락), 변동성 스캐너에 필요
+        assert params["GUBN"] == "1"  # 1=상승율 — 변동성 스캐너는 급등 종목 우선
         assert params["VOL_RANG"] == "0"
 
         overseas_broker._broker._auth_headers.assert_called_with("HHDFS76290000")
@@ -157,6 +158,7 @@ class TestFetchOverseasRankings:
         params = call_args[1]["params"]
 
         assert "/uapi/overseas-stock/v1/ranking/volume-surge" in url
+        assert params["KEYB"] == ""  # Required by KIS API spec
         assert params["EXCD"] == "NYS"
         assert params["MIXN"] == "0"
         assert params["VOL_RANG"] == "0"