Redstone
by Redstone
Information provided by Redstone, reviewed by Builders in Fintech. Last confirmed 2 November 2026.
Free return and risk numbers for about 4,100 US stocks and ETFs: Sharpe, drawdown, volatility and correlations, plus portfolio backtests. No account needed to browse.
- Category
- Wealth and investing
- Customers
- B2C
- API
- Available
- Pricing
- Freemium
- Markets
- United States
Redstone is a portfolio analytics site for self-directed investors. It covers about 2,900 US-listed stocks and 1,200 US ETFs, updated after every US trading day, with up to 5 years of history.
Each stock and ETF has a page with 1-year and 5-year returns (dividends reinvested), volatility, max drawdown, Sharpe and Sortino ratios, beta and alpha against SPY, and dividend yield. Screen stocks and ETFs, compare two tickers or portfolios side by side with their correlation, and browse public and model portfolios.
Build a portfolio from stock and ETF weights, backtest it with quarterly rebalancing, and optimize it for max Sharpe, max return or min volatility. A free, read-only MCP server lets Claude, ChatGPT and other AI assistants use the same numbers. Browsing is free without an account. Not investment advice.
Agent access
- API
- Available
- Auth method
- None
- MCP server
- https://redstonemarkets.com/api/mcpTry it
Provided by the company
Agent-Ready 2/5
- Discoverable — Can an agent find and read it?Found
- Documented — Can it understand the API without a login?Not found on 3 November 2026
- Testable — Can it try the API without a sales call?Not found on 3 November 2026
- Connectable — Can it connect directly (MCP)?Found
- Trusted — Can it see who runs it securely?Not found on 3 November 2026
Not in our registers
Standard v0.1.1 · checked 3 November 2026
Company-provided, not part of the CC BY dataset.