AST SpaceMobile Surges 8.6% on $3.6B Volume Spike Ranks 18th in U.S. Trading Liquidity Amid Sector Rotation

On October 8, 2025, AST SpaceMobile (ASTS) surged 8.63% to close at $X.XX, with a trading volume of $3.64 billion, representing a 178.64% increase from the prior day and ranking 18th among U.S. equities in volume. The satellite communications firm’s shares saw heightened liquidity amid renewed institutional interest in the sector.

Analysts noted the stock’s performance aligned with broader market rotation into underpenetrated infrastructure plays, though ASTS’s valuation multiples remain elevated compared to peers. A regulatory filing earlier this week highlighted progress in its low-Earth orbit satellite deployment schedule, though no material operational updates were disclosed to directly justify the price action.

Backtesting parameters for evaluating ASTS’s historical performance require defining key criteria: universe scope (e.g., S&P 500 vs. all U.S. equities), weighting methodology (equal-weight vs. market-cap), entry/exit timing (close-to-close vs. open-to-close), and transaction cost assumptions. These variables significantly influence the accuracy of any performance analysis, particularly for high-volatility names like ASTS.

Once these parameters are finalized, a daily top-500 list can be generated, enabling a back-test from January 1, 2022, through October 8, 2025. This framework will clarify whether ASTS’s recent surge reflects broader market dynamics or idiosyncratic factors tied to its business fundamentals.