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Implied Volatility ​

StandardPro

REQUIRED

The Theta Terminal must be running to access data.

Behavior

Returns implied volatilies calculated using the national best bid, mid, and ask price
of the option respectively. The underlying price represents whatever the last underlying price was at the
ms_of_day field. You can read more about how Thetadata calculates greeks
here.

Sample URL & Code

Paste the URL below into your browser while the Theta Terminal is running.
You can use the "request sample" box to the right of this box obtain sample
code in any programming language.

http://127.0.0.1:25510/v2/hist/option/implied_volatility?root=AAPL&exp=20230915&strike=170000&right=C&start_date=20230911&end_date=20230911

Parameters ​

Query Parameters

rootRequired  -

The symbol of the security. Option underlyings for indices might have special tickers.

Type: string
expRequired  -

The expiration date of the option contract formatted as YYYYMMDD.

Type: integer
strikeRequired  -

The strike price in 1/10th of a cent. A $170.00 strike price would be 170000.

Type: integer
rightRequired  -

The right of the option. 'C' for call; 'P' for put.

Type: string (Default: C)
EnumC, P
start_dateRequired  -

The start date (inclusive) of the request formatted as YYYYMMDD.

Type: integer
end_dateRequired  -

The end date (inclusive) of the request formatted as YYYYMMDD.

Type: integer
ivl  -

The interval size in milliseconds. 1 minute intervals is 60000. Omitting this value or setting it to 0will provide tick-level data instead of aggregated / intervalized data.

Type: integer (Default: 0)
rth  -

If this value is set to false and the request is for aggregated / intervalized data, the response will contain intervals from 00:00:000 ET to 23:59:999 ET. If the ivl is 0 or is unspecified, then rth will be forced to false. This means that all data for the day, even if it was outside regular trading hours would be returned. The default behavior is to only return data during regular trading hours (09:30:00.000 ET to 16:00.000 ET).

Type: boolean (Default: true)
use_csv  -

Output is in comma-separated values if true, legacy JSON if false.

Type: boolean (Default: false)
pretty_time  -

If this value is set to true, ms_of_day and date will take the format of 09:30:00.000 and 2020-01-01; if set to false, ms_of_day will return the timestamp in milliseconds since midnight EST.

Type: boolean (Default: false)

Responses ​

OK

Sample Code

py