Approximate weighted-average entry price for a CUSIP across 13F holders
Derived cost-basis approximation per fund and portfolio-wide. 13F filings disclose position SIZE per quarter-end, NOT transaction-level cost basis. This endpoint reconstructs an estimate by multiplying each fund's positive quarterly Δshares by that quarter's average daily close (Sugra Finance equity price feed). Sales are EXCLUDED - their basis cannot be unambiguously attributed without transaction-level disclosure. ticker query param is REQUIRED in v1 (CUSIP -> ticker resolver is a follow-up item). Each response carries an explicit methodology string and a per-fund + portfolio confidence tag - consumers must surface those to end users; the number is an estimate, not a tax cost basis.
Path parameters
9-character canonical CUSIP.
9-character canonical CUSIP.
Query parameters
Ticker symbol used to fetch per-quarter average daily close (required in v1; CUSIP->ticker resolver is B1.1 backlog).
Ticker symbol used to fetch per-quarter average daily close (required in v1; CUSIP->ticker resolver is B1.1 backlog).
Oldest stem in window. Default: oldest stem in retention manifest.
Oldest stem in window. Default: oldest stem in retention manifest.
Newest stem in window. Default: newest stem in retention manifest.
Newest stem in window. Default: newest stem in retention manifest.
Response
Per-fund + portfolio weighted-avg entry price for one CUSIP.
Example response
{
"data": {
"cusip": "037833100",
"ticker": "AAPL",
"funds": [
{
"cik": "0001067983",
"manager_name": "BERKSHIRE HATHAWAY INC"
}
]
},
"meta": {
"endpoint": "/api/v1/fred/us/cpi",
"data_time": "2026-04-16T14:30:00Z",
"response_time": "2026-04-16T14:30:12Z",
"provider": "Sugra API v1.0.1",
"source": "sugra_crypto",
"attribution": "Short interest and Reg SHO daily short volume data is owned by and sourced from FINRA (Financial Industry Regulatory Authority).",
"fallback_chain": [
"sugra_crypto",
"sugra_finance"
]
}
}