It's mkt-making, no? If you're just dumbly collecting the bid/ask spread, why would you expect losing days?How many companies have one losing day in >1300 trading days?
Before flash trading was legalized, I never heard of one single company that enjoyed that kind of wild streak. Now, it's a regular thing for all the big brokers - goldman, jpm, citi etc.
Why do you suppose that is?
Again, I am not saying that they are white as the driven snow, but should we be automatically assuming they're guilty?