Arm Holdings Plunges 2.48 as 1.26B-Share Volume Slumps to 173rd in U.S. Rankings 29.84% Liquidity Drop

On September 19, 2025, , marking its lowest intraday close in three weeks. . equities, . The stock’s underperformance coincided with a broader sell-off in semiconductor stocks, though Arm’s weakness appeared amplified by specific market dynamics.

Recent regulatory developments in China and Europe have heightened scrutiny over Arm’s licensing agreements for its chip architecture. While the company has not issued a public response, analysts note that potential restrictions on technology transfer could impact its . Meanwhile, Arm’s partnership with Apple for next-generation remains a key growth driver, though short-term volatility persists amid macroeconomic uncertainty.

To run this back-test accurately I need to make sure we share the same assumptions and data scope. Could you please confirm (or adjust) the following points? 1. Universe • All common stocks listed on US exchanges (NYSE + NASDAQ), excluding ETFs and preferreds. • ADRs are included unless you prefer to exclude them. 2. Selection rule (each trading day) • Rank by that day’s total dollar trading volume (price × shares). • Go long the top 500 names, equal-weight. • Signals generated at the day’s close, positions opened at next day’s open and closed at that same day’s close (1-day holding period). – If you’d rather transact at close-to-close instead of open-to-close, let me know. 3. Transaction costs and slippage • Assume zero for this initial run (we can layer those in later). 4. Back-test period • 2022-01-03 through the most recent close (2025-09-19). 5. Risk management • None for now (no stop-loss/take-profit), because positions are intraday. Once I have your go-ahead (or any edits), I’ll pull the required daily price & volume data and run the strategy.