GDAX started market trading way too soon, after a surprise launch of BCH trading. The momentary price spike could simply have resulted from people making unwise

GDAX started market trading way too soon, after a surprise launch of BCH trading. The momentary price spike could simply have resulted from people making unwise market orders without enough sell limits yet in place. GDAX shut down trading a second afterward, until the following day, when they allowed more time for limit orders to build up before opening market trading.