Joby Aviation's 299.64% Volume Surge Propels It to 195th in Market Ranking Despite 1.19% Stock Drop

On September 10, 2025, , . Despite the significant increase in liquidity, , reflecting mixed investor sentiment.

The surge in trading volume followed news of regulatory updates in the electric air taxi sector, . Analysts noted that while the high volume signaled renewed institutional interest, . Short-term traders appeared to dominate activity, .

Strategic partnerships remain a focal point, . The market’s reaction underscored sensitivity to operational progress, particularly as competitors advance their own certification schedules. However, no concrete earnings or product updates were released to directly influence the session’s outcome.

To run this back-test we need, for every U.S. trading day since 01-Jan-2022, the daily volume and next-day return of every listed stock so we can: 1. Rank all tradable tickers by that day’s volume. 2. Form an equal-weighted portfolio of the 500 highest-volume names. 3. Close the position at the next day’s close and record the return. Because this requires the full U.S. equity universe (≈7-8 K tickers) it will involve a large amount of data retrieval and processing time. Before I start pulling the data please let me know if you would like to: A. Proceed with the full universe (longer processing time). B. Restrict the universe to a liquid subset (e.g., Russell 3000 or Nasdaq+NYSE common shares) to speed things up. Once you confirm the universe I’ll fetch the required volume and price series and run the back-test.