Investments
Where it lives: at investments in the Financial Position — with accounts, stocks, funds and pensions inside it — and one by one from their own endpoints.
Investment accounts
The wrapper: the securities account the holdings sit in, with its own valuation and performance.
Stocks
Listed holdings, identified by isin and ticker, with the quantity held and the price used to value it.
Funds
Private pension plans
The retirement saving held at this institution, with contributions and valuation. Public pension entitlements are a different thing entirely and come from the administration — see Public Pensions.
Every valuation is a snapshot, not a quote. valuation_date is when the institution calculated it — usually the previous close, sometimes older for a fund. Do not present these figures as live market values, and do not compare two extractions taken at different times as if they were.