Is C3.ai Stock a Buy?

C3.ai's (NYSE:AI) stock tumbled 10% on Sept. 2 after the artificial intelligence software provider posted its first-quarter earnings. Its revenue rose 29% year-over-year to $52.4 million, beating estimates by $1.1 million. It posted a net loss of $37.5 million -- compared to a slim profit of $150,000 a year ago -- but its loss of $0.37 per share still matched Wall Street's expectations. Should investors buy C3 after its post-earnings plunge? Or is it still overvalued even after plummeting more than 70% from its 52-week high?