Saw that today too with my broker. This is indeed causing more problems.
As I am not allowed as Ameritrade or Schwab customer as I am Dutch, I have Interactive Brokers as my broker. I got this message from my broker:
As you’ve likely observed, elevated option implied volatilities indicate that the markets will be confronting elevated volatility both before and after the November 2020 election. IBKR shares that sentiment and believe it’s appropriate to start controlling leverage in a measured fashion in advance.
Consequently, to protect IBKR and its customers, IBKR will increase margin requirements by as much as 35% above normal margin requirements leading up to the November U.S. election. To illustrate, consider a Reg. T margin account with stock XYZ having an Initial Margin requirement of 50% and a Maintenance Margin requirement of 25%. With the increase fully implemented, the new requirements would be 67.5% Initial and 33.75% Maintenance. Accounts subject to risk based margin will have their scanning ranges increased in a similar manner.
This will be implemented gradually each day, increasing Initial margin requirements from normal levels starting September 28th to a rate that will be 35% higher by October 23rd. Maintenance margin requirements will increase in a similar manner between October 5th and October 30th. The new requirements will be implemented each day, after the market closes in New York, and will be effective the next trading day.
IBKR may make additional changes to the margin on certain products, or all products, depending on volatility. This includes changes built into the standard margin model as well as any new house margin requirements that may be imposed.
Interactive Brokers Client Services