US software sector ETF falls 3% after hours

The signal here is the timing more than the size: a 3% after-hours move in a sector ETF points to a reaction to information arriving outside the regular session, when liquidity is thin and moves can overstate conviction. Software is the part of the US equity market most sensitive to the growth-and-rates narrative, so a drop of this kind tends to travel beyond the fund itself into adjacent risk assets. With no stated catalyst in the material, the open question is whether the decline holds once the next session opens or reverses as after-hours dislocations often do.