Wiktionary
underperforming
That performs less well than required v
(present participle of underperform English)
Usage examples of "underperforming".
By the end of first grade, a black child is underperforming a statistically equivalent white child.
Sell off some underperforming stocks, get rid of some bonds, and use the proceeds to buy every last share we can find of our own stock.
The first was how such a grossly inadequate, underperforming, alÂcohol-abusing loser could ever have risen through the ranks to such an amazing position of trust.
Give him a sick company or an underperforming portfolio, and he was in his element.