According to @StockMKTNewz, StubHub (STUB) went public at $23.50 per share and ended its first trading day below the IPO price, source: @StockMKTNewz. The source questioned whether this underperformance signals trouble for the otherwise hot IPO market, source: @StockMKTNewz. The source also noted the debut coincided with a Powell day, calling it a tough day to go public, source: @StockMKTNewz.