The dollar value of one basis point (DV01) is the derivative of price with respect to yield:
![dv01 Dollar Duration](https://fincyclopedia.net/wp-content/uploads/2021/11/dv01.gif)
This tool reflects the dollar (rather than the percentage) change in price with respect to the yield of a fixed-income security (bonds, notes, etc) or a swap or any similar instrument (it can be even calculated for a portfolio). It measures the dollar price change per change (one basis point change) in yield.
It is also known as PV01 (present value of an 01) or BPV (basis point value).
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