As a young quarterback in high school, one of the first rules of play calling I was taught (in those days, the QB wound up calling a lot of the plays as there weren't headsets in our helmets and the hand signals from the bench would inevitably get fouled up - we are talking about high school boys here!) was to run the same play over and over again until the defense proved they could stop it. And in short, traders appear to be implementing this approach right now. After all, if it ain't broke, don't fix it, right?
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