GM Stock Dips 0.12 With 319th Volume Rank as EV Shift Hesitation Lingers

On September 8, 2025, , , ranking 319th in market activity. The stock’s muted performance reflects strategic production adjustments at its Fairfax Assembly Plant, where the automaker has delayed the return of a second shift due to anticipated slower electric vehicle (EV) demand. GM cited the need for "manufacturing flexibility" as it balances internal combustion engine (ICE) and EV production, with the plant set to begin assembling a gas-powered Chevrolet Equinox in 2027. This decision aligns with broader industry trends, including the expiration of major federal EV tax incentives at year-end, which could dampen consumer adoption of battery-powered models.

The Fairfax plant, a key economic driver for Kansas City, , both of which have been discontinued. GM’s shift to prioritize ICE production at the facility underscores its cautious approach to EV growth amid uncertain market conditions. The company emphasized its commitment to gas-powered vehicles, highlighting the Equinox’s allocation as a sign of confidence in the segment. Analysts note that GM’s ability to pivot between ICE and EV manufacturing could provide long-term operational advantages, though near-term delays in scaling EV production may pressure investor sentiment.

To run this back-test rigorously I need to pin down a few implementation details: 1. Universe • Should we scan the entire U.S. stock universe (all common stocks on NYSE + NASDAQ + AMEX), or a specific subset (e.g., S&P 500)? 2. Selection timing & execution price • Should the “top-500-by-volume” list be built from each day’s closing volume, and positions opened at the next day’s open? • Positions will be closed at the same next-day close (i.e., 1-trading-day holding period). Please confirm. 3. Transaction costs / slippage • Should we include commissions or a fixed bps slippage assumption, or ignore costs? 4. Portfolio construction • Equal-weight across the 500 names each day, or volume-weight / dollar-weight? Once these are set I can pull the required daily volume & price data, generate the daily trade list, .