AST SpaceMobile Surges 12.18% on $1.39 Billion Volume as Stock Ranks 71st in U.S. Trading Activity

On September 23, 2025, , . . equities. Recent developments suggest heightened market interest in the company's satellite-based mobile connectivity initiatives, driven by strategic partnerships and regulatory advancements in low-Earth orbit spectrum allocation. Analysts highlight the stock's performance as a reflection of growing investor confidence in the commercialization potential of space-based telecommunications infrastructure.

Market participants are closely monitoring AST's progress in deploying its first-generation mobile network satellites, with recent updates indicating successful testing of key communication protocols. While no official guidance on future launches has been released, industry observers note that the company's technical milestones could catalyze further institutional buying. Short-term volatility remains elevated, .

To run this back-test rigorously, I need to lock-in a few practical details that aren't fully specified yet. Below are the defaults I propose: All U.S. common stocks listed continuously since 2022-01-03 will be included, . Portfolios will be constructed using prior-day volume data, with trades executed at daily open and closed by close. . If these parameters are acceptable, I'll proceed with data collection and performance analysis.