Stock Market Today, Oct. 28: Boston Scientific Slips 6% After Cutting Q4 Sales and Full-Year EPS Guidance on Cyberattack Impact

Boston Scientific shares fell roughly 6% after the medical device maker cut its fourth-quarter sales outlook and full-year earnings-per-share guidance, citing the impact of a cyberattack. The transmission mechanism here is company-specific earnings revision rather than a broad macro shock, with the cut feeding into analyst estimate revisions and sector sentiment toward medtech names with operational or cybersecurity exposure. Medical device and healthcare equipment stocks are most directly exposed, as peers may face scrutiny over their own IT resilience and supply-chain continuity, while the broader market impact is likely contained given the single-issuer nature of the news. Traders will watch whether management provides further detail on the cyberattack's duration and recovery costs, and whether sell-side analysts materially lower forward estimates in the days following the revision.

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