Even with increased margins the stock was moving around so much that it could be worth 100 or 500 in a day.
further for every long call, there is a short call. The numbers got too big and the volatility too high.
think 3mm options represent 300mm shares on a stock moving 100 dollars in a few minutes: 30bn of notional risk. 5x the number of shares outstanding and no reasonable determination of what would be in the money or out of the money.
Add to that the number of trades that are going on and the capital that has to be fronted with the clearing houses to support that.
further for every long call, there is a short call. The numbers got too big and the volatility too high.
think 3mm options represent 300mm shares on a stock moving 100 dollars in a few minutes: 30bn of notional risk. 5x the number of shares outstanding and no reasonable determination of what would be in the money or out of the money.
Add to that the number of trades that are going on and the capital that has to be fronted with the clearing houses to support that.
There is NO systematic risk if all brokers take cash-only trades and no shorting with shares. Then there would be no risk of not being able to meet obligations from the buy-side especially from the retail level. Then if there is still risk, then it would be on the MM's side and that's not our problem. They've made enough from us. They should be able to make good on their side.