SoFi stock costs a lot... and may be worth it.SoFi Technologies (SOFI -9.61%) stock tumbled 12.5% through 9:45 a.m. ET Tuesday despite beating on top and bottom lines in its earnings report this morning.Heading into earnings, analysts forecast the online bank would earn $0.04 per share on $632.3 million. In fact, SoFi reported a profit of $0.05 per share, and its revenue exceeded expectations, at $697.1 million. SoFi by the numbersSoFi continued to post impressive growth in the third quarter, with members r ...