Source: FactSet Shares of Blue Apron were down more than 4 percent on Friday afternoon, ending the week down 17 percent. At $7.73, the share price was far below the IPO price of $10 a share. Blue Apron's not the only recent IPO that had a tough first week: Tech company Tintri closed the week down nearly 6 percent, after going public last week, a hair...