The Present Value displays the present value of the swap or swap strip.
Generally, for a swap using the SuperDerivatives’ calculated swap rate this result is zero; that is because the calculation is looking for a zero cost strike.
The system assigns a value to a swap (including the underlying swaps in a swap strip) until its settlement date. Accordingly, when calculating a swap strip, the calculation of its present value only takes into account the underlying swaps with unrealized P/L. That is, if one of the swap strip's underlying instruments has already settled (i.e., the settlement date is prior to the trade date), it is considered to have realized P/L and so that instrument is excluded from the calculation.