finance

**Judgement:** A solid, practical market-tracking skill for casual to intermediate use cases (quotes, FX, short historical series, and a local watchlist). It is well-suited for “what’s the price now?” questions and lightweight monitoring, but it should not be treated as a real-time or mission-critical market data source. **Key strengths:** - Supports a broad set of instruments (stocks, ETFs, indices, FX, and some crypto) with a simple CLI interface. - Uses no-key public providers (yfinance, ExchangeRate-API open access), making setup straightforward. - Caching and provider fallbacks are explicitly considered, which helps with rate limits and repeated queries. - Clear guidance on expected output formatting (quotes vs. series vs. watchlist) simplifies agent integration. **Main risks / limitations:** - **Data freshness and reliability:** Yahoo Finance via yfinance is unofficial and can be rate-limited or temporarily blocked; FX feed is only updated daily. Data should be treated as delayed and best-effort, not guaranteed accurate to the second. - **Coverage and consistency:** Crypto coverage is “best-effort” and may be incomplete or inconsistent across providers; symbol formats can differ and may require user guidance. - **No trading or execution integration:** This is a data lookup and summarization tool only; it must not be implied as sufficient for live trading or risk management. **Recommended scenarios:** - Users asking for recent prices, basic FX conversions, or short historical series for a small number of tickers. - Building simple watchlists and summarizing performance over time. - Educational, exploratory, or personal finance dashboards where approximate, delayed market data is acceptable. **Cautionary guidance for agents:** - Do not claim the data is real-time; explicitly mention when FX data is daily and when sources may lag. - If repeated calls trigger rate limits, explain the limitation to the user, rely more on cached data, and suggest adding a paid provider for higher-frequency or large-scale use. - Frame results as informational market data, not as personalized financial advice or trading signals.