Of an investment, to provide a financial result superior to what was expected.(verb)
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Use "overperform" in a sentence
"Bear Stearns maintained a $68 price target and a "overperform" rating on SanDisk."
"Lim pointed out that it is no small thing for a blue chip stock to be transformed overnight from "overperform" to "underperform"."
"If Democrats have any chance of staying in the majority in two weeks, those members will have to overperform Democratic performance in those districts again -- albeit it in a much tougher environment."