Quote from Lawrence Chan:
Posted some examples before in this thread.
Here is a simple one.
Buying specific Dow components agreesively, like raid the price ladder, for a very short time period, 5 to 10 seconds is enough. Then you have very predictable change in the Dow cash index.
Classic premium statistic arb would do the offset trades in the index future at once to lock in profit should there be enough premium discrepencies. But no, that is no longer the dominate arb trades in indices.
At the end of that price raid, these new arb programs wait for the index future to drift up as other market participants trying to ride the coattail from the move of the cash index ... like having sitting offer/ask waiting at the projected price change target.
Should the effect magnified as stops are triggered in various other components, then the initial position can be carried over into a directional play. If failed to induce further momentum in the position's favor, then complete the offset trades in the index future aggressively to turn it into a wash trade.
In short, it is better than playing poker. With a raise against your opponents, in turn you can push the cards coming to be in your favour automatically. Isn't that nice?