option_snapshot_open_interest

FreeValueStandardPro

Get the latest open interest snapshot for an option contract.

Code Example

Rust

let data = tdx.option_snapshot_open_interest("SPY", "20260417", "550", "C").await?;
for t in &data {
    println!("date={} open_interest={} expiration={} strike={:.2}",
        t.date, t.open_interest, t.expiration, t.strike);
}

Python

data = tdx.option_snapshot_open_interest("SPY", "20260417", "550", "C")
for t in data:
    print(f"date={t.date} open_interest={t.open_interest} "
          f"expiration={t.expiration} strike={t.strike:.2f}")

TypeScript

const data = tdx.optionSnapshotOpenInterest('SPY', '20260417', '550', 'C');
for (const t of data) {
    console.log(`date=${t.date} open_interest=${t.open_interest} expiration=${t.expiration} strike=${t.strike}`);
}

C++

auto data = client.option_snapshot_open_interest("SPY", "20260417", "550", "C");
for (const auto& t : data) {
    printf("date=%d open_interest=%d expiration=%d strike=%.2f\n",
        t.date, t.open_interest, t.expiration, t.strike);
}

Parameters

symbolstringrequired

Underlying symbol

expirationstringrequired

Expiration date in YYYYMMDD format

strikestringrequired

Strike price in dollars as a string

rightstringrequired

"C" for call, "P" for put

max_dteintoptional

Maximum days to expiration

strike_rangeintoptional

Strike range filter

min_timestringoptional

Minimum time of day as milliseconds from midnight

Response

open_interestint

Current open interest

datestring

Date

Sample Response

[
  {"date": 20260402, "open_interest": 32, "expiration": 20260417, "strike": 550.0}
]

Open interest for SPY 2026-04-17 550 call.

Notes

• Open interest is reported once per day, typically reflecting the previous day's settlement.