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A standout performer in the S&P 500 was Walgreens Boots, which surged nearly 18% during the session after news broke that it is in talks to sell itself to private equity firm Sycamore Partners. This marked the company's highest single-day gain since at least 1980. Despite facing a year marked by significant losses—about two-thirds of its value dropped since Monday—investors view this potential acquisition as a positive change for the struggling retailer.