Option Spread

OptionSpread represents an exchange-defined options strategy with more than one leg. The venue publishes the strategy as a single instrument with its own symbol, tick size, expiration, and execution rules.

Examples include listed vertical spreads, calendar spreads, and other option strategies.

Fields

Field	Rust type	Python type	Required/default	Notes
`instrument_id`	`InstrumentId`	`InstrumentId`	Required	Stored as `id` in Rust.
`raw_symbol`	`Symbol`	`Symbol`	Required	Native venue symbol.
`asset_class`	`AssetClass`	`AssetClass`	Required	Asset class of the underlying strategy.
`exchange`	`Option<Ustr>`	`str \| None`	`None`	Exchange MIC or venue code when known.
`underlying`	`Ustr`	`str`	Required	Underlying asset, future, or index.
`strategy_type`	`Ustr`	`str`	Required	Venue strategy type, such as vertical.
`activation_ns`	`UnixNanos`	`int`	Required	Strategy activation timestamp.
`expiration_ns`	`UnixNanos`	`int`	Required	Strategy expiration timestamp.
`currency`	`Currency`	`Currency`	Required	Premium quote and settlement currency.
`price_precision`	`u8`	`int`	Required	Decimal places allowed for prices.
`price_increment`	`Price`	`Price`	Required	Smallest valid price step.
`size_precision`	`u8`	`int`	`0`	Option spreads trade in whole contracts.
`size_increment`	`Quantity`	`Quantity`	`1`	Minimum contract size step.
`multiplier`	`Quantity`	`Quantity`	Required	Strategy multiplier.
`lot_size`	`Quantity`	`Quantity`	Required	Rounded lot or contract lot size.
`margin_init`	`Option<Decimal>`	`Decimal \| None`	`0`	Initial margin rate.
`margin_maint`	`Option<Decimal>`	`Decimal \| None`	`0`	Maintenance margin rate.
`maker_fee`	`Option<Decimal>`	`Decimal \| None`	`0`	Maker fee rate. Negative values rebate.
`taker_fee`	`Option<Decimal>`	`Decimal \| None`	`0`	Taker fee rate. Negative values rebate.
`max_quantity`	`Option<Quantity>`	`Quantity \| None`	`None`	Maximum order quantity.
`min_quantity`	`Option<Quantity>`	`Quantity \| None`	`1`	Minimum order quantity.
`max_price`	`Option<Price>`	`Price \| None`	`None`	Maximum valid quote or order price.
`min_price`	`Option<Price>`	`Price \| None`	`None`	Minimum valid quote or order price.
`tick_scheme_name`	N/A	`str \| None`	`None`	Registered variable tick scheme name.
`info`	`Option<Params>`	`dict \| None`	`None`	Adapter metadata.
`ts_event`	`UnixNanos`	`int`	Required	Event timestamp in nanoseconds.
`ts_init`	`UnixNanos`	`int`	Required	Initialization timestamp in nanoseconds.

Note: Python constructors use instrument_id; Rust stores the same value as id.

Behavior

OptionSpread has instrument class OptionSpread.
The venue publishes the spread as a single tradable instrument.
It trades in whole contracts with size precision 0 and size increment 1.
Store venue-specific leg details in info when the adapter provides them.

Example

use chrono::{TimeZone, Utc};
use nautilus_core::UnixNanos;
use nautilus_model::{
    enums::AssetClass,
    identifiers::{InstrumentId, Symbol},
    instruments::OptionSpread,
    types::{Currency, Price, Quantity},
};
use ustr::Ustr;

let activation = Utc.with_ymd_and_hms(2023, 11, 6, 20, 54, 7).unwrap();
let expiration = Utc.with_ymd_and_hms(2024, 2, 23, 22, 59, 0).unwrap();

let sr3_spread = OptionSpread::builder()
    .instrument_id(InstrumentId::from("UD:U$: GN 2534559.GLBX"))
    .raw_symbol(Symbol::from("UD:U$: GN 2534559"))
    .asset_class(AssetClass::FX)
    .exchange(Ustr::from("XCME"))
    .underlying(Ustr::from("SR3"))
    .strategy_type(Ustr::from("GN"))
    .activation_ns(UnixNanos::from(activation.timestamp_nanos_opt().unwrap() as u64))
    .expiration_ns(UnixNanos::from(expiration.timestamp_nanos_opt().unwrap() as u64))
    .currency(Currency::from("USD"))
    .price_precision(2)
    .price_increment(Price::from("0.01"))
    .multiplier(Quantity::from("1"))
    .lot_size(Quantity::from("1"))
    .ts_event(UnixNanos::default())
    .ts_init(UnixNanos::default())
    .build()
    .unwrap();

Adapters

Representative adapters that create or consume OptionSpread instruments include:

Databento for listed option spread markets.
Interactive Brokers for exchange-defined option strategies.

Option Contract covers single-leg option contracts.
Options covers option data, Greeks, and chain subscriptions.

Option Spread

Fields

Behavior

Example

Adapters

Related guides

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