A sharp drop in oil prices and global growth worries sent jitters through Wall Street, leading the three major U.S. indexes lower for the second straight day in volatile trading on Friday. After three days of gains, losses in the past two sessions have pushed the Nasdaq into the red for the week, while the S&P 500 and the Dow are roughly flat. Oil prices fell 2.5 percent as traders booked profits after a rally earlier this week pushed prices to their highest in 2016, and as the dollar regained lost ground. [O/R] Financial stocks came under pressure again as global issues, including uncertainty over interest rate hikes and the impending vote on Britain’s membership in the European Union, sent investors flocking to safe haven […]