Redstone Markets

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Performance, risk, comparisons, backtests and screening for US stocks and ETFs, with charts.

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backtest_portfolio Read-only

Use this when the user describes a portfolio of US stocks and ETFs with weights (e.g. "60% VTI, 40% BND", "equal parts AAPL, MSFT, NVDA") and wants to know how it would have done or how risky it is: returns over YTD, 1 year and 5 years (rebalanced quarterly), max drawdown, Sharpe, beta vs SPY and the correlation between holdings, charted against SPY. 2 to 20 holdings. Not for live brokerage accounts, trading or allocation advice.

positionsarray, required

Tools (4)

backtest_portfolio

read-only

Argument	Type	Description
positions*	array

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "positions"
  ],
  "properties": {
    "positions": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "ticker",
          "weight"
        ],
        "properties": {
          "ticker": {
            "type": "string",
            "maxLength": 12,
            "minLength": 1,
            "description": "US ticker symbol, e.g. AAPL, VOO or BRK.B"
          },
          "weight": {
            "type": "number",
            "description": "Relative weight, e.g. 60 for 60%. Weights are rescaled to sum to 100%, so equal weights can all be 1",
            "exclusiveMinimum": 0
          }
        }
      },
      "maxItems": 20,
      "minItems": 2
    }
  }
}

compare_securities

Use this when the user wants to compare 2 to 5 US stocks or ETFs side by side (e.g. "VOO vs QQQ", "SCHD or VYM?"): returns, drawdown, Sharpe, beta and how correlated they are, with an overlaid 1Y/5Y chart. End-of-day data for US large and mid caps, major foreign stocks and US ETFs. Not for intraday quotes or recommendations on what to buy.

read-only

Argument	Type	Description
tickers*	array	Tickers to compare, in the order the user named them

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "tickers"
  ],
  "properties": {
    "tickers": {
      "type": "array",
      "items": {
        "type": "string",
        "maxLength": 12,
        "minLength": 1,
        "description": "US ticker symbol, e.g. AAPL, VOO or BRK.B"
      },
      "maxItems": 5,
      "minItems": 2,
      "description": "Tickers to compare, in the order the user named them"
    }
  }
}

get_security_metrics

Use this when the user asks how a single US stock or ETF has performed or how risky it is: YTD, 1-year and 5-year annualized returns, max drawdown, Sharpe, Sortino, beta and alpha, with a 1Y/5Y chart. End-of-day data for US large and mid caps, major foreign stocks and US ETFs. Not for intraday quotes, news, earnings, fundamentals or price targets.

read-only

Argument	Type	Description
ticker*	string	US ticker symbol, e.g. AAPL, VOO or BRK.B

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "ticker"
  ],
  "properties": {
    "ticker": {
      "type": "string",
      "maxLength": 12,
      "minLength": 1,
      "description": "US ticker symbol, e.g. AAPL, VOO or BRK.B"
    }
  }
}

screen_securities

Use this when the user wants a ranked list of US stocks or ETFs by a performance or risk metric, optionally within a sector or ETF category (e.g. "lowest volatility dividend ETFs", "highest Sharpe tech stocks this year", "energy stocks with the smallest drawdown"). Covers about 2,000 US-listed stocks and about 670 US ETFs, end-of-day. Not for fundamentals (P/E, revenue), news or buy recommendations.

read-only

Argument	Type	Description
type	string	Limit to stocks, ETFs, or both
limit	integer
order	string
sector	string	Case-insensitive match on a stock's GICS sector (e.g. Information Technology, Health Care, Energy, Financials) or an ETF's category (e.g. Dividend, Bonds, Treasury, Large Cap Growth, Emerging Markets, Gold)
sortBy	string	Metric to rank by. For lowest risk, sort maxDrawdown1yPct descending (closest to 0) or beta1y ascending
filters	array	Optional bounds in each metric's own units, e.g. {metric: 'beta1y', max: 1}. maxDrawdown1yPct is negative, so a drawdown smaller than 20% is {metric: 'maxDrawdown1yPct', min: -20}

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "type": {
      "enum": [
        "stock",
        "etf",
        "all"
      ],
      "type": "string",
      "default": "all",
      "description": "Limit to stocks, ETFs, or both"
    },
    "limit": {
      "type": "integer",
      "default": 10,
      "maximum": 25,
      "minimum": 1
    },
    "order": {
      "enum": [
        "desc",
        "asc"
      ],
      "type": "string",
      "default": "desc"
    },
    "sector": {
      "type": "string",
      "maxLength": 40,
      "description": "Case-insensitive match on a stock's GICS sector (e.g. Information Technology, Health Care, Energy, Financials) or an ETF's category (e.g. Dividend, Bonds, Treasury, Large Cap Growth, Emerging Markets, Gold)"
    },
    "sortBy": {
      "enum": [
        "return1dPct",
        "returnYtdPct",
        "return1yPct",
        "return5yAnnualizedPct",
        "maxDrawdown1yPct",
        "sharpe1y",
        "sortino1y",
        "beta1y",
        "alpha1yPct"
      ],
      "type": "string",
      "default": "return1yPct",
      "description": "Metric to rank by. For lowest risk, sort maxDrawdown1yPct descending (closest to 0) or beta1y ascending"
    },
    "filters": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "metric"
        ],
        "properties": {
          "max": {
            "type": "number"
          },
          "min": {
            "type": "number"
          },
          "metric": {
            "enum": [
              "return1dPct",
              "returnYtdPct",
              "return1yPct",
              "return5yAnnualizedPct",
              "maxDrawdown1yPct",
              "sharpe1y",
              "sortino1y",
              "beta1y",
              "alpha1yPct"
            ],
            "type": "string"
          }
        }
      },
      "maxItems": 5,
      "description": "Optional bounds in each metric's own units, e.g. {metric: 'beta1y', max: 1}. maxDrawdown1yPct is negative, so a drawdown smaller than 20% is {metric: 'maxDrawdown1yPct', min: -20}"
    }
  }
}