The index value is the spot value of the PONY Index and is calculated with the Laspeyres formula which measures price changes against a fixed quantity weight, the weightfactor.
\[Indexvalue_{t} = {\sum_{i\ in\ Tokens} {wf_{i,t} \cdot p_{i,t}} \over Divisor_{t}}\]
- Weightfactor (wf): fixed quantity of tokens determined at the most recent Determination Phase from prices and target weights that.
- Price (p): value of the vault in USD.
Divisor: a constant that is adjusted on each Reconstitution Date to maintain the continuity of the index value.