The normal vega result displays the change in the instrument’s value if the See "Market Normal Vol " is shifted by 1bp.
The normal vega result is displayed for the following instruments:
Cap/floor
General cap/floor
Cap strategies (straddle, collar, strangle, spread)
Swaption (based on either a vanilla swap or a general swap)
Swaption strategy (straddle, collar, strangle, spread)