KLA’s 0.24% Decline on $0.93B Volume Pushes It to 115th in Market Activity

KLA (KLAC) fell 0.24% on September 24, 2025, with a trading volume of $0.93 billion, ranking 115th in market activity for the day. The decline reflects ongoing market concerns about semiconductor industry dynamics and broader macroeconomic factors affecting tech sector valuations.

Recent developments highlight mixed signals for KLA’s business outlook. A reported slowdown in demand for advanced inspection equipment from leading foundry clients has raised questions about near-term revenue growth. Meanwhile, supply chain disruptions in critical materials used for wafer processing tools remain a persistent challenge, though the company has not yet issued specific guidance on mitigation timelines.

Analysts note that KLA’s stock performance remains closely tied to cyclical trends in capital expenditure cycles among semiconductor manufacturers. While the company maintains strong market share in its core lithography and metrology segments, investors appear cautious about potential headwinds from extended industry inventory correction phases.

To design a rigorous back-test I need to pin down a few implementation details: 1. Universe • Which market should the “top-500 by daily trading volume” be drawn from (e.g., all U.S. listed equities, only NYSE + NASDAQ, China A-shares, etc.)? • Should we filter out micro-caps, ETFs, ADRs, etc., or include everything? 2. Trade timing • Entry price: buy at the same-day close or next-day open? • Exit price after the 1-day holding period: next-day close or next-day open? 3. Position sizing & portfolio construction • Equal-weight each of the 500 names (standard approach) or weight by volume or something else? • Rebalance every trading day (i.e., form a new 500-stock basket each day)? 4. Frictions • Any transaction cost/slippage assumption to apply? Once these points are set, I can generate the data-retrieval plan and run the back-test from 2022-01-03 (first trading day of 2022) to today.