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On September 26, 2025,
(TSLA) surged 4.02% with a trading volume of $43.66 billion, ranking first in market activity. The stock's performance coincided with renewed investor focus on electric vehicle sector dynamics and regulatory developments in key markets.Recent regulatory updates in China and the EU highlighted potential policy risks for EV manufacturers, prompting strategic reassessments among investors. Analyst activity intensified following updated production forecasts from Tesla's Giga Factory network, with production efficiency metrics drawing particular scrutiny. Supply chain updates indicated stabilization in battery component procurement, though raw material price volatility remained a watchpoint.
Investor sentiment was further shaped by capital allocation decisions from major institutional holders, with recent filings showing shifting exposure levels in the EV sector. Market participants are closely monitoring the interplay between production ramp-up timelines and global demand patterns, particularly in markets with evolving regulatory frameworks.
To run this back-test robustly I need to pin down a few implementation details: 1. Universe • Do you want all U.S. listed common stocks (≈ 6 000 names) considered each day, or a narrower universe such as the S&P 1500 / Russell 3000 constituents? • Are ADRs, ETFs, and preferred shares excluded? 2. Volume definition • “Daily trading volume” measured in shares or in dollar value (volume × close price)? 3. Portfolio construction • Equal weight across the 500 selected names each day? • Rebalance fully every trading day (i.e., sell previous holdings at the close and buy the new 500 names at the same close)? 4. Transaction cost assumptions • Include commissions/slippage? If so, what rate per trade (e.g., 5 bps each side)? Once these points are set, I’ll generate the daily selection lists, create one-day holding signals, and feed them to the back-test engine for the period 2022-01-03 to 2025-09-26. Let me know your preferences, and I’ll proceed automatically with reasonable defaults if any field is left unspecified.

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