Asset management giant BlackRock has a 575-1 record in approving its ETFs with the Securities and Exchange Commission ( SEC ). That said, the SEC has approved 575 BlackRock ETFs, rejecting just one in October 2014, when the firm sought permission to create actively managed ETFs that don't require daily disclosure of holdings. According to previous news, iShares, a subsidiary of asset management giant BlackRock, submitted documents to the US SEC on Thursday afternoon to establish a bitcoi...