“In addition, long stock positions will require 100% margin and short stock positions will require 300% margin until further notice,” the brokerage said.

Meaning investors could only unwind their positions, not create new ones. Option trading into liquidation only due to the extraordinary volatility in the markets. On Thursday, Interactive Brokers Group IBKR,Īnnounced that as of midday Wednesday, it put GameStop, AMC, BlackBerry Limited 13 and said it has placed “restrictions in place on certain transactions in GME and other securities.”

“We made these decisions out of an abundance of caution amid unprecedented market conditions and other factors.”Ĭharles Schwab, which bought TD Ameritrade but operates it as an independent retail brokerage, said that it has tightened margin requirements in some of those stocks, including GameStop.Ī Schwab spokeswoman said that the platform changed its margin requirements, limiting how much an investor can borrow, on Jan.

“In the interest of mitigating risk for our company and clients, we have put in place several restrictions on some transactions in $GME, $AMC and other securities,” a spokeswoman for TD Ameritrade told MarketWatch, referring to the ticker symbols of the companies.