MPWR Surges 5.36% on $630M Volume as Semiconductor Sector Ranks 192nd in Trading Activity

Monolithic Power (MPWR) surged 5.36% on October 6, 2025, with a trading volume of $0.63 billion, marking a 60.36% increase from the previous day. The stock ranked 192nd in trading activity across the market, indicating heightened institutional or retail participation in the semiconductor sector.

Recent developments suggest renewed investor confidence in the firm's core business. Analysts noted that the price action aligns with technical indicators showing oversold conditions earlier in the week. While no direct earnings or product announcements were cited in available reports, the surge follows broader industry trends where energy-efficient power solutions remain in demand amid fluctuating global supply chains.

To run this back-test rigorously I need to pin down a few practical details first: 1. Market universe • Are we talking about all U.S. listed common stocks (NYSE + NASDAQ + AMEX), or another equity universe? 2. “Daily trading volume” definition • Should the ranking be by share count traded or by dollar volume (shares × close price)? 3. Entry/exit prices • Enter at today’s close and exit at tomorrow’s close (standard close-to-close one-day hold), or would you prefer open-to-close / close-to-open? 4. Transaction costs & slippage • Should we assume zero frictions, or apply a per-trade cost? 5. Weighting scheme inside the 500-stock basket • Equal-weight each position, or dollar-volume-weight relative to the day’s trading volume? Once I have these details I can set up the data pulls and run the back-test for 2022-01-01 through today.