ETF
The ETF asset class: what it means in Vike Trader's instrument taxonomy, which picker tab it appears under, and what it drives.
ETF — an exchange-traded fund — a basket that trades like a share. It is one of 11 asset classes in Vike Trader's taxonomy
(vike_catalog::AssetClass), and every instrument carries exactly one.
The taxonomy is deliberately an enum over one parametric Instrument, not a type per product.
That is the modelling decision the whole instruments tree turns on:
an instrument is a row of properties — tick size, lot step, minimum notional, session calendar —
and its class says how to read them, rather than a separate Rust type per product with its own
duplicated placement rules.
What the class drives
- The Symbol picker: this class appears under the Stocks tab.
- Symbology: what a symbol for this class looks like per venue, and which field map decodes it.
- Market hours: which session calendar applies, and therefore when an order can rest.
Where this comes from
vike_catalog::AssetClass and its picker-tab mapping, exported as rosters.json at every
release. Which venues carry which class is a property of each venue's catalog rather than of the
class, so it is on the venue pages instead of here.