Futures Spread

FuturesSpread represents an exchange-defined futures strategy with more than one leg, such as a calendar spread or inter-commodity spread. The venue defines the strategy, symbol, tick size, and expiry.

Examples include listed futures calendar spreads and exchange-supported spread markets.

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 product or product family.
`strategy_type`	`Ustr`	`str`	Required	Venue strategy type, such as calendar.
`activation_ns`	`UnixNanos`	`int`	Required	Strategy activation timestamp.
`expiration_ns`	`UnixNanos`	`int`	Required	Strategy expiration timestamp.
`currency`	`Currency`	`Currency`	Required	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`	Futures 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

FuturesSpread has instrument class FuturesSpread.
The venue publishes the spread as a single tradable instrument.
It trades in whole contracts with size precision 0 and size increment 1.
Use leg data from the adapter metadata when a strategy needs venue-specific leg details.

Example

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

let activation = Utc.with_ymd_and_hms(2022, 6, 21, 13, 30, 0).unwrap();
let expiration = Utc.with_ymd_and_hms(2024, 6, 21, 13, 30, 0).unwrap();

let es_spread = FuturesSpread::new(
    InstrumentId::from("ESM4-ESU4.GLBX"),
    Symbol::from("ESM4-ESU4"),
    AssetClass::Index,
    Some(Ustr::from("XCME")),
    Ustr::from("ES"),
    Ustr::from("EQ"),
    UnixNanos::from(activation.timestamp_nanos_opt().unwrap() as u64),
    UnixNanos::from(expiration.timestamp_nanos_opt().unwrap() as u64),
    Currency::from("USD"),
    2,
    Price::from("0.01"),
    Quantity::from("1"),
    Quantity::from("1"),
    None,
    None,
    None,
    None,
    None,
    None,
    None,
    None,
    None,
    UnixNanos::default(),
    UnixNanos::default(),
);

Adapters

Representative adapters that create or consume FuturesSpread instruments include:

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

Futures Contract covers single-leg futures.
Continuous Futures covers roll-adjusted futures series.

Futures Spread

Fields

Behavior

Example

Adapters

Related guides

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