feat: add yfinance support to accommodate community request for stability and quota

main.py

@@ -12,12 +12,12 @@ config["deep_think_llm"] = "gpt-5-mini"  # Use a different model
 config["quick_think_llm"] = "gpt-5-mini"  # Use a different model
 config["max_debate_rounds"] = 1  # Increase debate rounds
 
-# Configure data vendors (default uses yfinance and alpha_vantage)
+# Configure data vendors (default uses yfinance, no extra API keys needed)
 config["data_vendors"] = {
-    "core_stock_apis": "yfinance",           # Options: yfinance, alpha_vantage, local
+    "core_stock_apis": "yfinance",           # Options: alpha_vantage, yfinance
-    "technical_indicators": "yfinance",      # Options: yfinance, alpha_vantage, local
+    "technical_indicators": "yfinance",      # Options: alpha_vantage, yfinance
-    "fundamental_data": "alpha_vantage",     # Options: openai, alpha_vantage, local
+    "fundamental_data": "yfinance",          # Options: alpha_vantage, yfinance
-    "news_data": "alpha_vantage",            # Options: openai, alpha_vantage, google, local
+    "news_data": "yfinance",                 # Options: alpha_vantage, yfinance
 }
 
 # Initialize with custom config

tradingagents/dataflows/interface.py

@@ -4,6 +4,7 @@ from typing import Annotated
 from .y_finance import (
     get_YFin_data_online,
     get_stock_stats_indicators_window,
+    get_fundamentals as get_yfinance_fundamentals,
     get_balance_sheet as get_yfinance_balance_sheet,
     get_cashflow as get_yfinance_cashflow,
     get_income_statement as get_yfinance_income_statement,
@@ -78,6 +79,7 @@ VENDOR_METHODS = {
     # fundamental_data
     "get_fundamentals": {
         "alpha_vantage": get_alpha_vantage_fundamentals,
+        "yfinance": get_yfinance_fundamentals,
     },
     "get_balance_sheet": {
         "alpha_vantage": get_alpha_vantage_balance_sheet,

tradingagents/dataflows/y_finance.py

@@ -293,6 +293,63 @@ def get_stockstats_indicator(
     return str(indicator_value)
 
 
+def get_fundamentals(
+    ticker: Annotated[str, "ticker symbol of the company"],
+    curr_date: Annotated[str, "current date (not used for yfinance)"] = None
+):
+    """Get company fundamentals overview from yfinance."""
+    try:
+        ticker_obj = yf.Ticker(ticker.upper())
+        info = ticker_obj.info
+
+        if not info:
+            return f"No fundamentals data found for symbol '{ticker}'"
+
+        fields = [
+            ("Name", info.get("longName")),
+            ("Sector", info.get("sector")),
+            ("Industry", info.get("industry")),
+            ("Market Cap", info.get("marketCap")),
+            ("PE Ratio (TTM)", info.get("trailingPE")),
+            ("Forward PE", info.get("forwardPE")),
+            ("PEG Ratio", info.get("pegRatio")),
+            ("Price to Book", info.get("priceToBook")),
+            ("EPS (TTM)", info.get("trailingEps")),
+            ("Forward EPS", info.get("forwardEps")),
+            ("Dividend Yield", info.get("dividendYield")),
+            ("Beta", info.get("beta")),
+            ("52 Week High", info.get("fiftyTwoWeekHigh")),
+            ("52 Week Low", info.get("fiftyTwoWeekLow")),
+            ("50 Day Average", info.get("fiftyDayAverage")),
+            ("200 Day Average", info.get("twoHundredDayAverage")),
+            ("Revenue (TTM)", info.get("totalRevenue")),
+            ("Gross Profit", info.get("grossProfits")),
+            ("EBITDA", info.get("ebitda")),
+            ("Net Income", info.get("netIncomeToCommon")),
+            ("Profit Margin", info.get("profitMargins")),
+            ("Operating Margin", info.get("operatingMargins")),
+            ("Return on Equity", info.get("returnOnEquity")),
+            ("Return on Assets", info.get("returnOnAssets")),
+            ("Debt to Equity", info.get("debtToEquity")),
+            ("Current Ratio", info.get("currentRatio")),
+            ("Book Value", info.get("bookValue")),
+            ("Free Cash Flow", info.get("freeCashflow")),
+        ]
+
+        lines = []
+        for label, value in fields:
+            if value is not None:
+                lines.append(f"{label}: {value}")
+
+        header = f"# Company Fundamentals for {ticker.upper()}\n"
+        header += f"# Data retrieved on: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}\n\n"
+
+        return header + "\n".join(lines)
+
+    except Exception as e:
+        return f"Error retrieving fundamentals for {ticker}: {str(e)}"
+
+
 def get_balance_sheet(
     ticker: Annotated[str, "ticker symbol of the company"],
     freq: Annotated[str, "frequency of data: 'annual' or 'quarterly'"] = "quarterly",

tradingagents/default_config.py

@@ -22,10 +22,10 @@ DEFAULT_CONFIG = {
     # Data vendor configuration
     # Category-level configuration (default for all tools in category)
     "data_vendors": {
-        "core_stock_apis": "yfinance",       # Options: yfinance, alpha_vantage
+        "core_stock_apis": "yfinance",       # Options: alpha_vantage, yfinance
-        "technical_indicators": "yfinance",  # Options: yfinance, alpha_vantage
+        "technical_indicators": "yfinance",  # Options: alpha_vantage, yfinance
-        "fundamental_data": "alpha_vantage", # Options: alpha_vantage, yfinance
+        "fundamental_data": "yfinance",      # Options: alpha_vantage, yfinance
-        "news_data": "yfinance",             # Options: yfinance, alpha_vantage
+        "news_data": "yfinance",             # Options: alpha_vantage, yfinance
     },
     # Tool-level configuration (takes precedence over category-level)
     "tool_vendors": {