$Unitedhealth(UNH.US)@Longbridge @Longbridge Xiaoqiao

** I found Longbridge's margin requirements for option combinations to be very unreasonable. **

For example, the call vertical strategy option combination (I bought the 20270115 290 Call at 75.58 and sold the 20270115 400 Call at 30.78, with a maximum loss of 44.8), it does not calculate the margin for the option combination based on your maximum loss (USD 4,480), but roughly sets the margin to the price of the purchased Call (290 Call), and the margin requirement will increase as the value of this 290 Call increases.

For example, suppose UnitedHealth Group surges to 400 tomorrow, at which point the 290 Call will be worth USD 12,500 and the 400 Call will be worth USD 6,200. At this point, my option combination is worth USD 6,300. My maximum loss is still the cost of USD 4,480. However, the margin requirement at this time will increase from USD 7,558 to USD 12,500. And I may be forced to liquidate quickly because the margin is much lower than required. When liquidating, it may also be due to the large price difference between the buyer and seller of the option, and the system chooses the most "fire sale" method to liquidate in order to liquidate quickly, resulting in losses. But for this option strategy, I should make money when the stock price rises, and there is no increase in risk throughout the process, but I will be forced to liquidate due to unreasonable margin requirements.