Return Stats

{
  "annualisedMeanPct": 12.5,
  "annualisedVolatilityPct": 6.78735,
  "asOf": "2026-10-11T20:30:30.520Z",
  "bestPeriodPct": 4,
  "cagrPct": 13.0071,
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "maxDrawdownPct": 2,
  "meanReturnPct": 1.04167,
  "notChecked": [
    "small samples: a Sharpe ratio from a dozen periods is very noisy",
    "non-normal returns, fat tails and serial correlation, which the annualisation assumes away",
    "…2 more"
  ],
  "periods": 12,
  "reasons": [
    "Sharpe = (mean - risk-free) / sample standard deviation x sqrt(periods per year); Sortino uses downside deviation below the risk-free rate.",
    "Only 12 periods: treat the ratios as rough."
  ],
  "sharpe": 1.54699,
  "sortino": 3.44721,
  "source": "computed locally",
  "summary": "12 periods: average 1.042%/period, volatility 6.79% a year, Sharpe 1.55, Sortino 3.45, CAGR 13.01%, max drawdown 2%.",
  "totalReturnPct": 13.0071,
  "verdict": "COMPUTED",
  "volatilityPerPeriodPct": 1.95934,
  "winRatePct": 66.67,
  "worstPeriodPct": -2
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://invest-math.x402tookit.com/return-stats?periodsPerYear=12&returnsPct=2%2C-1%2C3%2C1.5%2C-2%2C4%2C0.5%2C-0.5%2C2.5%2C1%2C-1.5%2C3&riskFreePct=2'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://invest-math.x402tookit.com/return-stats?periodsPerYear=12&returnsPct=2%2C-1%2C3%2C1.5%2C-2%2C4%2C0.5%2C-0.5%2C2.5%2C1%2C-1.5%2C3&riskFreePct=2' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Finvest-math.x402tookit.com%2Freturn-stats
const res = await pay("https://invest-math.x402tookit.com/return-stats?periodsPerYear=12&returnsPct=2%2C-1%2C3%2C1.5%2C-2%2C4%2C0.5%2C-0.5%2C2.5%2C1%2C-1.5%2C3&riskFreePct=2");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://invest-math.x402tookit.com/return-stats?periodsPerYear=12&returnsPct=2%2C-1%2C3%2C1.5%2C-2%2C4%2C0.5%2C-0.5%2C2.5%2C1%2C-1.5%2C3&riskFreePct=2")
    print(res.status_code, res.text)