Opening Bell: U.S. Stocks Slip on Global Growth Concerns; Walgreens Reports Mixed Quarter

U.S. stocks dropped on Tuesday following weak German manufacturing data for February and a Japanese yen that continues to strengthen. Meanwhile, Walgreens Boots Alliance (WBA) - Get Report , a holding of Jim Cramer's Action Alerts PLUS portfolio, reported second quarter earnings of $1.31 a share, beating estimates by $0.03 a share. Revenue of $30.2 billion fell short of Wall Street's forecasts. The company says its 2015 acquisition of Rite Aid (RAD) - Get Report is 'progressing as planned.' Tesla (TSLA) - Get Report shares slipped after the company said it delivered only 14,820 cars during the first quarter, missing its previous forecast of 16,000 amid a parts shortage issue. TheStreet's Scott Gamm reports from Wall Street.