Google shares appeared to drop to 1 cent per share on Tuesday, an event that prompted Nasdaq officials to begin investigating “potentially erroneous” Google stock transactions, according to Reuters.

Google’s share price closed at $320.50 on Tuesday, down more than 15%. The company’s after-hours share price had risen to $415 at the time this article was filed, reflecting news of Nasdaq’s commitment to address the error with a share price adjustment.

In an e-mailed statement, a Nasdaq spokesman explained, “The canceled trades were triggered by erroneous orders that were routed to Nasdaq from another market center.”