Block (XYZ 0.36%) got blocked by a number of potential investors after the fintech company's first-quarter earnings disappointed the market. The stock is now trading down more than 46% on the year as of this writing, following its recent sell-off. While best known for its original Square business, it was Block's Cash App business that led to the sell-off. Square was originally developed to allow merchants to accept credit card payments from their phones and tablets and has since become a platform that lets ...