Symbol tail risk

GET/v1/symbols/{symbol}/tail-riskPromised whole

How fat and how lopsided the loss tail is, plus the best and worst single days.

Parameters

symbolpathrequired
Ticker symbol, case-insensitive.

Response contract

Every field in the response is part of the contract.

Response fields

The top level keys a live response actually returned, read off the API rather than written down here.

cvar95cvar99symbolbestDaykurtosisskewnessworstDay

How this was verified

Called against 3 different subjects on the live API. Every field it returned, at every level, was compared with the contract above. Last checked August 18, 2026.

Request

curl "https://api.massari.ai/v1/symbols/AAPL/tail-risk" \
  -H "Authorization: Bearer $MASSARI_TOKEN"

Example response

{
  "cvar95": 5.751620536146853,
  "cvar99": 9.500507150974506,
  "symbol": "AAPL",
  "bestDay": 33.26572008113591,
  "kurtosis": 26.273800586361084,
  "skewness": -0.37783013258769543,
  "worstDay": -51.86525265127886
}

A real response from the live API, captured August 18, 2026. Nothing was dropped, so this is the whole shape. Either way it is valid JSON.