$Yiren Digital(YRD.US) surged +59% in a single day, with trading volume expanding to hundreds of times its usual level. The catalyst was the company announcing a $20 million share repurchase plan. However, the same announcement revealed that Q1 revenue actually fell 41% year-over-year. For a small-cap China concept stock with revenue halved, can a mere repurchase drive such a move? Is this a fundamental inflection point or pure short squeeze driven by positioning? I bet on the latter. The $20 million repurchase is just a trigger relative to its trading volume; what really drove the surge is the low float combined with retail sentiment. This kind of impulsive spike in small-cap China concept stocks usually has poor sustainability. Don't chase if you missed the boat.