Wall Street jittery ahead of earnings rush, tech in focus By: CNBC.com News April 23, 2015 at 05:40 AM EDT U.S. stock index futures pointed to a lower open Thursday, with Wall Street jittery ahead of day crammed with major corporate earnings. Read More >> Related Stocks: 3M Co Amazon.com Capital One Financial Caterpillar Dunkin' Brands Group General Motors Google, Inc. Hershey Co Microsoft PepsiCo Procter & Gamble Sentinelone Inc Cl A Starbucks Corp