Fiserv’s Volume Plunges to 244th in U.S. Equities Amid Shifting Investor Focus

Fiserv closed on Sept. 26 with a 0.70% gain, but its trading volume dropped to $420 million, marking a 28.43% decline from the previous day’s activity. The stock ranked 244th in volume among U.S. equities, reflecting reduced liquidity or shifting investor focus.

Back-test parameters for evaluating volume-driven strategies require defining key parameters. A practical approach involves selecting a finite universe—such as S&P 500 or Russell 3000 constituents—rather than an open “all stocks” set. Execution mechanics, including rebalancing timing (close-to-close vs. open-to-close) and weighting schemes (equal-weight or value-weight), must also be specified to ensure methodological consistency.

Price data typically relies on closing prices, though alternative series may be considered. Once parameters are confirmed, the back-test can aggregate daily volume rankings and simulate a one-day-hold portfolio from Jan. 3, 2022, to Sept. 26, 2025. Final results will depend on the selected universe and execution rules.