Super Micro Computer Inc. shares plunged the most in nine months after the company lowered its fiscal-year revenue forecast, raising questions about sales and pricing pressures around powerful AI servers.

The server maker’s forecast is lower than it was earlier this year, but analysts seem doubtful about the new target as well — and worried about competition.

Super Micro Computer (SMCI) stock is plummeting after disappointing fiscal fourth-quarter results and annual outlook