Rubrik Plunges to 319th in U.S. Volume Amid Tech Sector Turbulence and Cloud Infrastructure Rotation

On September 16, 2025, , , . equities. The stock’s performance followed mixed market sentiment amid sector-specific dynamics and investor positioning shifts in cloud infrastructure stocks.

Analysts noted that Rubrik’s underperformance aligned with broader volatility in tech stocks, though no direct earnings or strategic updates were reported by the company. The decline occurred despite recent institutional activity in the cloud data management sector, with investors rotating out of high-growth names amid macroeconomic uncertainty.

To make sure I set up the back-test exactly the way you intend, could you please confirm a few details? 1. Universe • Which exchange(s) should we scan each day to identify the “top 500” – e.g., all NYSE + NASDAQ stocks, only constituents, or another list? • Should be included or only common stocks? 2. Ranking metric • Rank by dollar volume (price × shares) or by share volume? • Use the most recently completed trading day’s volume (so we open positions at next day’s open)? 3. Portfolio construction • Equal-weight each of the 500 names, or weight by volume / market-cap / something else? • Rebalance daily (sell yesterday’s 500 at the next day’s open, simultaneously buy today’s 500)? 4. • Enter at the next day’s open and exit at the close of the same day (1-day hold), or open-to-open? • Any transaction cost or slippage assumption to include? Once I have these points, I can build the retrieval plan and run the back-test.