S&P 500 Gains and Losses Today: Medical Device Makers ResMed, Insulet Lead Index

Market Overview - The S&P 500 increased by 0.2% on August 27, ahead of Nvidia's earnings report and key economic data releases later in the week [1][2] - Major U.S. equity indexes, including the Nasdaq, also saw gains, with the Dow achieving a record high close [2] Company Performances - ResMed's shares surged by 7.3%, driven by a positive outlook for the sleep apnea devices market, which is expected to grow at a compound annual growth rate (CAGR) of 8.5% [3] - Insulet's shares rose by 6.6% following FDA approval of its Omnipod 5 insulin pump for type 2 diabetes, marking it as the first automated insulin delivery system approved for both type 1 and type 2 diabetes [4] - Travel industry stocks gained after Trip.com reported better-than-expected quarterly sales and profits, with Royal Caribbean Cruises, Norwegian Cruise Line, and Carnival seeing increases of 4.3%, 3.6%, and 2.7% respectively [5] Declining Stocks - Walgreens Boots Alliance experienced a 9.0% drop in shares after Eli Lilly announced a cheaper version of its weight-loss treatment, raising concerns about Walgreens' sales [6] - Paramount Global's shares fell by 7.2% after media executive Edgar Bronfman Jr. withdrew his acquisition proposal, leading to uncertainties about the company's future [7] - Martin Marietta Materials saw a 4.3% decline in shares, despite a price target increase from Morgan Stanley, due to insider share sales indicating potential lack of confidence [8]