`SettlePriceDenominator` for the market should be applied to get the real previous day settlement price. This field should be ignored if `HasPreviousDaySettlementPrice` is set to `N`. `PreviousDaySettlementPrice` will be sent for futures markets(not options). From the start of the day until the settlement price is published, the value of PDSP and settlement price would be the same. Once the settlement price is published, PDSP would stay the same and the settlement price would be updated to the current day settlement price. If there is a holiday, the exchange will distribute the PreviousDaySettlementPrice for the date that is specified on `SettlePriceDateTime` (day before holiday) and `HasPreviousDaySettlementPrice` will be set to `Y`.

public long PreviousDaySettlementPrice { get; }