ASML Plunges 4.52% as Trading Volume Surges 90.14% to Rank 38th in Market Activity

ASML fell 4.52% on October 10, 2025, with a trading volume of $2.79 billion, marking a 90.14% surge from the previous day and ranking 38th in market activity. The stock’s sharp decline drew attention amid mixed market conditions, though no specific earnings or strategic updates were disclosed in the provided materials.

Analysts noted the unusual volume spike as a key indicator of institutional or algorithmic trading activity, though no direct catalysts were identified in the filtered news. The absence of major corporate announcements or regulatory changes left the move largely unexplained, with market participants speculating about broader sector rotation or short-term liquidity shifts.

To run this back-test I need to make several practical assumptions that aren’t fully spelled out in the request. Please confirm (or adjust) the default settings below so I can proceed immediately: 1. Universe • All common stocks listed on NYSE + NASDAQ + AMEX that have been active since 2022-01-01. 2. Ranking rule (done every trading day D) • Use that day’s total dollar trading volume (shares × close price) to sort the universe. • Select the top 500 names. 3. Trade execution • Buy the 500 names at the next session’s open (D+1 open). • Exit the entire basket at the same day’s close (D+1 close). • Positions are equal-weighted (1/500 each) at entry. 4. Test window • 2022-01-03 through the latest completed trading day (2025-10-10). 5. Costs • Assume zero transaction costs and slippage (unless you’d like to specify values).