Premarket movers (via BBG): Block shares (XYZ) rise 3% in premarket trading after the digital payments provider was upgraded to outperform from inline at Evercore ISI, with analysts citing positives such as resilient consumer spending trends and a boost from new products. Bumble shares (BMBL) fall 5.4% in premarket trading on Tuesday after JPMorgan downgrades to underweight from neutral. Credo Technology shares (CRDO) advance 13% in premarket trading after the company reported revenue for the fourth quarter that beat the average analyst estimate. Dollar General shares (DG) rise 8.1% ahead of the bell after the retailer reported first-quarter profit and sales that topped expectations, and management boosted its comparable sales forecast for the full year, as well as the low end of its EPS target. MoonLake Immunotherapeutics shares (MLTX) jump 22% in premarket trading after the Financial Times reported that Merck held talks to buy the Swiss biotech firm, citing three unidentified people familiar with the matter. Pinterest (PINS) gains 3.8% in premarket trading after JPMorgan raises rating to overweight from neutral. A diversification of its advertising platform to provide full-funnel capabilities is supporting further revenue upside at the social media firm, says analyst Doug Anmuth. Signet Jewelers shares (SIG) climb 13% in premarket trading after the owner of Kay Jewelers boosted its adjusted earnings per share forecast for the full year, following first-quarter results that was ahead of expectations. Woodward shares (WWD) are up 1% after it was upgraded back to buy at Deutsche Bank, after 11 months with a hold rating on the aircraft and industrial engine component maker, with the broker conceding last year’s cut was a mistake.