Sandisk Plunges 5.64% as $1.23 Billion Volume Ranks 8th Amid Tech Sell-Off

On October 6, 2025, Sandisk (SNDK) closed with a 5.64% decline, marking its eighth position in daily trading volume among U.S.-listed equities at $1.23 billion. The drop followed a broader market selloff in tech-related assets amid mixed signals on AI infrastructure demand.

Analysts noted that the stock's performance aligned with sector-wide volatility, as investors reassessed near-term growth projections for data storage providers. While no company-specific earnings or strategic updates were reported, market participants cited shifting sentiment toward cloud infrastructure investments as a key factor. The decline occurred despite recent sector outperformance in Q3 earnings reports from peers.

To run this back-test robustly I need to pin down a few practical details: 1. Universe • Do you want all U.S.-listed common stocks (NYSE + NASDAQ), or a different universe? 2. Entry & exit price • Typical implementations buy at the close on Day 0 and sell at the close on Day 1. • Alternatively we can buy next day’s open and sell that same day’s close. Which convention would you like? 3. Weighting and rebalancing • I’ll assume the 500 names are equally-weighted each day, the basket is re-formed daily, and there’s no leverage. • Let me know if that differs from your intent. Once I have those answers I can generate the signal file and run the back-test from 2022-01-03 (first trading day of 2022) through today.