Teradyne Plummets 5.23% as $520M Volume Ranks 213th in U.S. Markets

On October 7, 2025, Teradyne (TER) closed with a 5.23% decline, trading volume reaching $0.52 billion, ranking 213th among U.S. stocks. The selloff followed a series of strategic updates and market sentiment shifts affecting the semiconductor equipment sector.

Recent developments highlighted a shift in investor focus toward short-term operational metrics. Analyst commentary emphasized the company's pending quarterly guidance revisions, which suggested potential underperformance against sector benchmarks. Additionally, macroeconomic factors, including tightening credit conditions for capital-intensive manufacturing, weighed on sector-wide valuations.

Portfolio positioning adjustments by institutional investors further amplified the downward pressure. A notable trend emerged in trading patterns, with algorithmic strategies exiting long positions ahead of earnings releases, triggering liquidity imbalances in after-hours sessions. This dynamic created a self-reinforcing cycle of declining prices and reduced bid-ask spreads.

To set up an accurate back-test I need to pin down a few details: Market universe, Re-balancing convention, Weighting & capital allocation, Trading frictions. Once I have this, I can pull the data and run the back-test from 2022-01-01 through today.