> For the complete documentation index, see [llms.txt](https://docs.notional.finance/v3-technical-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.notional.finance/v3-technical-docs/currency-ids-and-precision/market-indexes.md).

# Market Indexes

fCash markets of a given currency are identified by Market Indexes. Market Indexes identify the tenor of active markets using a predefined tenor cadence: 

* 3 month (market index = 1)
* 6 month (market index = 2)
* 1 year (market index = 3)
* 2 year (market index = 4)
* 5 year (market index = 5)
* 10 year (market index = 6)
* 20 year (market index = 7)

As an example, using a market index of 1 would refer to a 3 Month fCash market and a market with an index of 3 would refer to a 1 Year fCash market.