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Boston Scientific shares slide as August cyberattack threatens full-year guidance

9/8/2026

A cyberattack has put Boston Scientific's financial guidance for 2026 in jeopardy.

The company, which trades under the ticker BSX, said Tuesday that a cybersecurity incident on August 25 is expected to have a "material impact" on its results.

Material impact is the regulatory disclosure threshold that signals damage large enough to alter how investors should read a company's numbers. Shares fell nearly 2% to around 47, landing at the 50-day moving average.

The 50-day moving average is the rolling mean of a stock's closing prices over the most recent 50 trading sessions. Traders watch this level closely.

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