Stocks dropped Tuesday as strong economic data continued to cast doubts on whether the Federal Reserve can slow down its pace of interest rate hikes. Signet Jewelers (SIG) jumped 20% after the diamond jewelry retailer raised its full-year financial outlook to reflect “current business trends” and its recent acquisition of Blue Nile. Sumo Logic (SUMO) raised its fiscal-year sales outlook and the software company forecast an adjusted loss of 35 cents to 36 cents a share, narrower than Wall Street expectations.