NIO Surges 3.14% on $680M Trading Volume Climbs to 170th in Market Activity Amid Production Gains

NIO (NIO) surged 3.14% on October 2, 2025, with a trading volume of $680 million, marking a 53.97% increase from the previous day and ranking 170th in market activity. The stock’s momentum reflects renewed investor interest amid strategic updates and production efficiency gains reported in recent filings.

Analysts highlighted the company’s progress in optimizing battery production costs and expanding its service network in key Asian markets. These developments align with the firm’s Q3 2025 guidance, which emphasized cost rationalization and margin improvement. However, concerns over global EV demand volatility persist, tempering aggressive bullish sentiment in the short term.

For the back-test: To execute this analysis, the following parameters must be confirmed: the universe definition (e.g., U.S. listed stocks or S&P 500 constituents), data frequency (EOD vs. intraday volume), portfolio weighting methodology (equal-weight vs. market-cap-weighted), and performance metrics (gross returns, Sharpe ratio, etc.). With these details finalized, the study can construct daily “top-500-by-volume” portfolios from January 1, 2022, to October 2, 2025, and assess one-day-hold returns while addressing survivorship bias and transaction cost assumptions.