CISS Rockets 84% on 284095% Volume Surge to $390M Jumps to 292nd in Market Activity

On October 7, 2025, C3is (CISS) surged 84.16%, driven by a dramatic 284,095.87% increase in trading volume to $390 million, ranking it 292nd in market activity. The stock's explosive move reflected intense short-term investor interest, though no direct catalysts were disclosed in available reports.

Analysis of market dynamics suggests the surge may stem from algorithmic trading activity or liquidity provider interventions, given the absence of material news. The volume spike alone indicates heightened speculative positioning, though sustainability of gains remains uncertain without fundamental support.

To run this back-test rigorously I need to clarify a couple of practical details: 1. Universe • Do you want to rank every U.S. listed common stock each day (≈ 6,000 names) or restrict the universe (e.g., Russell 3000, S&P 1500, NASDAQ-only, etc.)? 2. Execution convention • Typical workflow: select the day’s top-500 by volume using that day’s closing data, buy them at the next day’s open, and exit at that day’s close (1-day holding period). 3. Transaction costs & slippage • Should we assume zero costs, or add a fixed bps cost per round-trip? Once I have these three points, I can pull the data, create the daily baskets, and run the portfolio back-test from 2022-01-01 to today.