FILE PHOTO - A TD Ameritrade sign is seen outside a branch in the financial district in New York, U.S. on February 29, 2016. REUTERS/Brendan McDermid/File Photo

(Reuters) - Retail brokerage TD Ameritrade Holding Corp AMTD.O said on Friday it will allow clients to trade bitcoin futures on the newly minted CBOE Futures Exchange from Dec. 18.

TD Ameritrade’s shares were up 2.4 percent in extended trading.

Bitcoin prices BTC=BTSP hit a record high of $17,428 on Friday, amid warnings that it was a bubble on the verge of bursting.

Cboe Global Markets Inc CBOE.O launched its bitcoin futures contract on Dec. 10, just over a week ahead of rival CME Group Inc CME.O, as the exchange operator takes the next step toward launching an exchange-traded fund based on the digital currency.

Bitcoin futures and other derivatives would make it easier for more investors and speculators to trade the new asset class.

The first bitcoin futures trades kicked off on Sunday at 6 p.m. (2300 GMT) on the CBOE Futures Exchange (CFE).

Electronic brokerage firm Interactive Brokers Group Inc IBKR.O earlier this week said it is offering bitcoin futures under the ticker symbol "GXBT" on the CFE and plans to offer the same on the Chicago Mercantile Exchange (CME) from Dec. 18.