Fix market open price to show opening price instead of stale close

- Extract opening price from Finnhub quote response (field 'o')
- At market open, if current price equals previous close, use opening price
- Prevents showing yesterday's close when market just opened at 9:30 AM ET
- Adds logging when opening price is used

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

stock_api/finnhub_api.py

@@ -51,6 +51,17 @@ class FinnhubAPI(StockAPIBase):
 
             current_price = float(quote['c'])  # Current price
             previous_close = float(quote['pc'])  # Previous close
+            open_price = float(quote.get('o', 0))  # Opening price
+
+            # Use MarketHours utility for accurate market status
+            from market_hours import MarketHours
+            market_open = MarketHours.is_market_open()
+
+            # At market open, if current price equals previous close and we have an open price,
+            # use the opening price as the current price (trades may not have updated yet)
+            if market_open and current_price == previous_close and open_price > 0:
+                current_price = open_price
+                logger.info(f"Using opening price for {ticker} at market open: ${open_price}")
 
             if current_price == 0 or previous_close == 0:
                 logger.warning(f"Invalid price data for ticker: {ticker}")
@@ -59,10 +70,6 @@ class FinnhubAPI(StockAPIBase):
             change_dollar = current_price - previous_close
             change_percent = (change_dollar / previous_close) * 100
 
-            # Use MarketHours utility for accurate market status
-            from market_hours import MarketHours
-            market_open = MarketHours.is_market_open()
-
             return {
                 'ticker': ticker.upper(),
                 'company_name': company_name,