Mixed ⁢Trading Day: Ulta Beauty Soars as Regeneron Pharmaceuticals Plunges

Updated May 31, 2025

U.S. equities⁣ indexes presented a mixed performance at the close of a holiday-shortened week. Renewed trade tensions​ with China, fueled by President Trump’s remarks, ​coupled with a⁣ report indicating a ​greater-than-expected‌ drop ⁣in inflation, contributed to market volatility. Investors are closely watching the stock⁣ market ⁢ for signs of stability.

The S&P 500 recovered from a deeper decline to close down less than 0.1%. ⁣The⁣ Nasdaq fell 0.3%, while the ⁢Dow Jones Industrial Average managed a 0.1% gain. Despite Friday’s fluctuations, both the Nasdaq and S&P 500 recorded their best months as 2023.

Regeneron Pharmaceuticals (REGN)​ experienced the steepest drop in the S&P 500, plummeting 19%. This decline followed the failure of its experimental chronic obstructive pulmonary disease (COPD)‌ treatment, developed with Sanofi (CUT), to meet primary endpoints in a Phase 3 trial. The companies are evaluating the data and consulting with regulators regarding potential next steps. Sanofi’s U.S.-listed shares⁣ also fell, declining 5.7%.The pharmaceutical industry is known for its high-risk, high-reward ventures.

Cooper Cos. (COO) saw its ‌shares ​fall 15% after the contact lens manufacturer lowered ⁤its full-year organic growth forecast, despite exceeding ⁤sales and adjusted profit estimates for its fiscal‍ second quarter. JPMorgan analysts downgraded Cooper stock from⁣ “overweight” to “neutral,” ⁢citing inconsistent performance and a potential slowdown in market trends.

Eastman Chemical (EMN) shares decreased by 3.8% after the Department of Energy revoked a $375 million public funding award for‍ its molecular⁢ recycling project in⁤ Longview,‍ Texas.

Ulta⁤ Beauty (ULTA) stood out with a 12% surge, leading the S&P ⁢500’s daily performance.The cosmetics retailer exceeded sales and profit ⁣expectations for its fiscal first quarter and raised its full-year outlook. CEO Kecia Steelman attributed the⁤ success to new and exclusive brands, as well as strong⁤ fragrance sales,‍ noting that consumers are increasingly turning ⁤to beauty products “as a comfort⁤ and escape from the stress‌ of macro uncertainty.” The consumer discretionary sector continues to show resilience.

Palantir Technologies (PLTR) shares rose ‌7.7% following ‌a ‌ New York times report indicating an expanded role for the data analytics firm in ‌government data-sharing initiatives. The company, which holds notable contracts with the federal⁢ government and the Defense Department, is reportedly working to improve data access across government ⁢agencies.

Enphase ​Energy ‍(ENPH)‌ stock increased by‌ 5.5%. The solar microinverter ⁣manufacturer​ had faced pressure after the House of Representatives passed a bill that ⁤would eliminate certain​ incentives for clean energy ⁣projects.Enphase Energy​ shares had ‍previously fallen to a ‍52-week low but have since partially recovered.

Costco Wholesale (COST) stock gained 3.1% after the retailer’s quarterly revenue and net income surpassed consensus forecasts. Same-store sales also exceeded expectations. Analysts ‍suggest⁤ that high-margin membership revenue could provide ‍Costco with flexibility to manage tariff-related cost pressures without raising ⁣prices.

What’s next

investors will be ⁤closely monitoring upcoming economic data releases and any further developments in U.S.-China trade relations to⁢ gauge the market’s direction in the⁢ coming‌ weeks. The stock market remains sensitive to geopolitical ⁣and macroeconomic ‌factors.