Oil drop, lackluster earnings weigh on Wall Street

With the S&P 500 up in eight of the past 10 weeks and nearing the record high set almost a year ago, traders are struggling to find reasons to push it even higher as underwhelming earnings and the specter of higher interest rates hover over markets. The U.S. Federal Reserve is expected to hold interest rates steady after a two-day meeting set to begin Tuesday, but policymakers may be more upbeat on the economic outlook leaving the path open for future rate hikes. Perrigo Co , down 17 percent