While the dividend and buyback may have been music to investors' ears, though, the "flash-crash" definitely was not. Apple's stock tumbled on Friday, as a rogue trade sent the stock down nearly 10% in seconds. The trade in question may have been be an order placed through the BATS exchange, which, ironically, had trouble with its own ticker while going public Friday. Parent company Bats Global Markets ( BATS) said in a statement issued at 10:48 a.m. EST, "Please be advised that BATS is currently investigating system issues trading in symbols range A through BF. Will advise." Shares of Apple dipped on Friday, closing down $3.29, or 0.55%, at $596.05.