Commodity

Commodity represents a spot commodity market such as gold, silver, oil, or another physical asset quoted in a currency. It models a spot market, not a dated futures contract.

Examples include XAUUSD.IDEALPRO and venue-specific commodity cash symbols.

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	Commodity asset classification.
`quote_currency`	`Currency`	`Currency`	Required	Currency used to price the commodity.
`price_precision`	`u8`	`int`	Required	Decimal places allowed for prices.
`size_precision`	`u8`	`int`	Required	Decimal places allowed for order sizes.
`price_increment`	`Price`	`Price`	Required	Smallest valid price step.
`size_increment`	`Quantity`	`Quantity`	Required	Smallest valid size step.
`ts_event`	`UnixNanos`	`int`	Required	Event timestamp in nanoseconds.
`ts_init`	`UnixNanos`	`int`	Required	Initialization timestamp in nanoseconds.
`base_currency`	N/A	`Currency \| None`	`None`	Python‑only base asset currency, if known.
`lot_size`	`Option<Quantity>`	`Quantity \| None`	`None`	Rounded lot or board size.
`max_quantity`	`Option<Quantity>`	`Quantity \| None`	`None`	Maximum order quantity.
`min_quantity`	`Option<Quantity>`	`Quantity \| None`	`None`	Minimum order quantity.
`max_notional`	`Option<Money>`	`Money \| None`	`None`	Maximum order notional value.
`min_notional`	`Option<Money>`	`Money \| None`	`None`	Minimum order notional value.
`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.
`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.
`tick_scheme_name`	N/A	`str \| None`	`None`	Registered variable tick scheme name.
`info`	`Option<Params>`	`dict \| None`	`None`	Adapter metadata.

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

Behavior

Commodity has instrument class Spot.
It allows negative prices: spot markets such as electricity or oil can trade below zero, and the RiskEngine accepts negative prices on both order submission and modification.
It is never inverse, and its cost currency is the quote currency.
It has no activation timestamp, expiry, strike, option kind, or settlement currency field.
Use FuturesContract for dated exchange-traded commodity futures.

Example

use nautilus_core::UnixNanos;
use nautilus_model::{
    enums::AssetClass,
    identifiers::{InstrumentId, Symbol},
    instruments::Commodity,
    types::{Currency, Price, Quantity},
};

let gold = Commodity::builder()
    .instrument_id(InstrumentId::from("GOLD.COMEX"))
    .raw_symbol(Symbol::from("GOLD"))
    .asset_class(AssetClass::Commodity)
    .quote_currency(Currency::from("USD"))
    .price_precision(2)
    .size_precision(0)
    .price_increment(Price::from("0.01"))
    .size_increment(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 Commodity instruments include:

Interactive Brokers for spot commodity and metal contracts.

Futures Contract covers dated futures on commodity underlyings.
Data explains market data that references instruments.

Commodity

Fields

Behavior

Example

Adapters

Related guides

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