What are a portfolio's sub-holding keys?

Understand the configuration that you can use to control how LUSID calculates holdings for a portfolio

By default, LUSID separates holdings at the instrument level, i.e. two transactions in the same instrument will contribute to the same holding. This also applies to cash, where separate holdings (balances) are created for each currency.

There are various instances where it is desirable to separate the holdings further:

The sub-holding keys that LUSID will use to generate the holdings are configurable when the portfolio is created. Note: Since they play such a critical part in how holdings are calculated by LUSID, it is not possible to update a portfolio's sub-holding keys after it has been created.

The values for these sub-holding keys are then provided at a transaction or holding level when these are loaded into LUSID.