The last time CBOE suffered an outage similar to this [3], it led to the NASDARK debacle and 3 hours of radio silence from the largest (and most liquid) exchange in the world:
And the problem appears to be HFT-related once again:
- *CBOE SAYS FIX USERS ON C2 PROBLEMS W/ORDERS, CANCELS, QUOTES
- *CBOE: SOME USERS CURRENTLY EXPERIENCING PROBLEMS ROUTING ORDERS