ETF overlap
Shared holdings and overlapping weight between two funds.
Parameters
symbolpathrequired
Ticker symbol, case-insensitive.
otherpathrequired
The second fund to compare against.
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.
etf_aetf_boverlap_countoverlap_weight_aoverlap_weight_bshared_holdings
How this was verified
Called against 2 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/funds/SPY/overlap/QQQ" \
-H "Authorization: Bearer $MASSARI_TOKEN"Example response
{
"etf_a": "SPY",
"etf_b": "QQQ",
"overlap_count": 86,
"overlap_weight_a": 0.5021,
"overlap_weight_b": 0.9173,
"shared_holdings": [
{
"holding_symbol": "NVDA",
"holding_name": "NVDA",
"weight_a": 0.08012,
"weight_b": 0.08988
},
{
"holding_symbol": "AAPL",
"holding_name": "AAPL",
"weight_a": 0.06485,
"weight_b": 0.07152
}
]
}A real response from the live API, captured August 18, 2026. This one is CUT: long arrays, wide objects and long strings were trimmed to keep it readable, so treat it as a sample of the shape rather than all of it. Either way it is valid JSON.