feat(news): configurable fetch params via DEFAULT_CONFIG

Per-ticker article limit, global article limit, global lookback
window, and macro query list are now read from get_config()
instead of being hardcoded. Tool wrapper get_global_news passes
None defaults so config overrides flow through the LLM-tool path
too. Macro query defaults broadened from 4 US-centric strings to
5 covering Fed, S&P 500, geopolitics, ECB/BOJ/BOE, commodities.

#606 #558 #562

tradingagents/agents/utils/news_data_tools.py

@@ -1,5 +1,5 @@
 from langchain_core.tools import tool
-from typing import Annotated
+from typing import Annotated, Optional
 from tradingagents.dataflows.interface import route_to_vendor
 
 @tool
@@ -23,16 +23,20 @@ def get_news(
 @tool
 def get_global_news(
     curr_date: Annotated[str, "Current date in yyyy-mm-dd format"],
-    look_back_days: Annotated[int, "Number of days to look back"] = 7,
-    limit: Annotated[int, "Maximum number of articles to return"] = 5,
+    look_back_days: Annotated[Optional[int], "Days to look back; omit to use the configured default"] = None,
+    limit: Annotated[Optional[int], "Max articles to return; omit to use the configured default"] = None,
 ) -> str:
     """
     Retrieve global news data.
-    Uses the configured news_data vendor.
+    Uses the configured news_data vendor. Defaults for look_back_days and
+    limit come from DEFAULT_CONFIG (global_news_lookback_days,
+    global_news_article_limit); pass explicit values to override.
+
     Args:
         curr_date (str): Current date in yyyy-mm-dd format
-        look_back_days (int): Number of days to look back (default 7)
-        limit (int): Maximum number of articles to return (default 5)
+        look_back_days (int): Number of days to look back; omit to inherit config
+        limit (int): Maximum number of articles to return; omit to inherit config
+
     Returns:
         str: A formatted string containing global news data
     """

tradingagents/dataflows/yfinance_news.py

@@ -1,9 +1,12 @@
 """yfinance-based news data fetching functions."""
 
+from typing import Optional
+
 import yfinance as yf
 from datetime import datetime
 from dateutil.relativedelta import relativedelta
 
+from .config import get_config
 from .stockstats_utils import yf_retry
 
 
@@ -64,9 +67,10 @@ def get_news_yfinance(
     Returns:
         Formatted string containing news articles
     """
+    article_limit = get_config()["news_article_limit"]
     try:
         stock = yf.Ticker(ticker)
-        news = yf_retry(lambda: stock.get_news(count=20))
+        news = yf_retry(lambda: stock.get_news(count=article_limit))
 
         if not news:
             return f"No news found for {ticker}"
@@ -106,27 +110,28 @@ def get_news_yfinance(
 
 def get_global_news_yfinance(
     curr_date: str,
-    look_back_days: int = 7,
-    limit: int = 10,
+    look_back_days: Optional[int] = None,
+    limit: Optional[int] = None,
 ) -> str:
     """
     Retrieve global/macro economic news using yfinance Search.
 
     Args:
         curr_date: Current date in yyyy-mm-dd format
-        look_back_days: Number of days to look back
-        limit: Maximum number of articles to return
+        look_back_days: Number of days to look back. ``None`` falls back to
+            ``global_news_lookback_days`` from the active config.
+        limit: Maximum number of articles to return. ``None`` falls back to
+            ``global_news_article_limit`` from the active config.
 
     Returns:
         Formatted string containing global news articles
     """
-    # Search queries for macro/global news
-    search_queries = [
-        "stock market economy",
-        "Federal Reserve interest rates",
-        "inflation economic outlook",
-        "global markets trading",
-    ]
+    config = get_config()
+    if look_back_days is None:
+        look_back_days = config["global_news_lookback_days"]
+    if limit is None:
+        limit = config["global_news_article_limit"]
+    search_queries = config["global_news_queries"]
 
     all_news = []
     seen_titles = set()

tradingagents/default_config.py

@@ -35,6 +35,21 @@ DEFAULT_CONFIG = {
     "max_debate_rounds": 1,
     "max_risk_discuss_rounds": 1,
     "max_recur_limit": 100,
+    # News / data fetching parameters
+    # Increase for longer lookback strategies or to broaden macro coverage;
+    # decrease to reduce token usage in agent prompts.
+    "news_article_limit": 20,             # max articles per ticker (ticker-news)
+    "global_news_article_limit": 10,      # max articles for global/macro news
+    "global_news_lookback_days": 7,       # macro news lookback window
+    # Search queries used by get_global_news for macro headlines. Extend or
+    # replace to broaden geographic / sector coverage.
+    "global_news_queries": [
+        "Federal Reserve interest rates inflation",
+        "S&P 500 earnings GDP economic outlook",
+        "geopolitical risk trade war sanctions",
+        "ECB Bank of England BOJ central bank policy",
+        "oil commodities supply chain energy",
+    ],
     # Data vendor configuration
     # Category-level configuration (default for all tools in category)
     "data_vendors": {