Traders on the floor of the New York Stock ExchangeSource: The New York Stock ExchangeIn typical bull-market fashion, big investors rushed to trim back on equity risk the week before last only to re-load days later once the erratic short-squeeze activity abated, a prominent hedge-fund “victim” bobbed to the surface and the broader system bent without anything important breaking.In the late-January dip, credit markets didn’t flinch and Treasury yields failed to give up much of their recent surge – which resumed this week as investors reprice debt markets for an economic acceleration and the Federal Reserve’s new vow to stoke …