Shares of online brokerage TD Ameritrade (AMTD) experienced an apparently erroneous trade in Thursday morning’s premarket action.

According to Thomson Reuters (TRI) data, a single trade of 50 shares of TD Ameritrade at $130 was placed at 6:30 a.m. ET, compared with the company’s Tuesday close of $30.44. (U.S. markets were closed on Wednesday in observance of Christmas Day).

Under clearly erroneous trade policies, such a trade would have been busted by the exchange.

At the New York Stock Exchange, where TD Ameritrade is listed, a clearly erroneous trade occurs when there is "an obvious error in any term, such as price, number of shares or other unit of trading."

New York-based NYSE did not immediately respond to a request for comment.

Shares of TD Ameritrade opened smoothly Thursday morning and were recently trading down 0.26% to $30.26, trimming their 2013 rally to 80.6%. 

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