Potbelly Soars 31% on $330M Surge to 345th U.S. Trading Rank

, 2025, , . The stock ranked 345th in trading activity among U.S. equities, reflecting an unprecedented spike in investor interest.

The dramatic volume surge suggests heightened market participation, potentially driven by short-term speculative activity or news catalysts. While no direct earnings or operational updates were cited in the provided data, the extreme volatility underscores liquidity-driven momentum trading dynamics. The move aligns with patterns observed in low-liquidity stocks during high-velocity trading sessions, where institutional or algorithmic strategies can amplify price swings.

A back-test of a high-frequency trading strategy using the top 500 most liquid U.S. equities by daily volume revealed mixed outcomes. From January 3, 2022, to September 10, 2025, . However, it underperformed the S&P 500 Total Return index, . , highlighting risks associated with liquidity-focused, short-hold approaches.