Alphabet (GOOGL) shares suffered their worst post-earnings sell-off on record, as investors grew increasingly concerned about the cost of the artificial intelligence boom.

The Google parent plunged 12% on Thursday, Oct. 29, and sank another 2% on Oct. 30, after reporting disappointing third-quarter results. The sell-off has prompted Wall Street analysts to reconsider their outlook for the stock.

TheStreet Pro’s portfolio manager Chris Versace has lowered his price target on Alphabet to $380 from $410 following the earnings report.

“We are seeing a wave of price target cuts for Alphabet (GOOGL) shares following the company’s third-quarter results last night. We too will join that group. We’re…