 Shares of Paychex Inc. PAYX, -0.63 jumped 3.2 in premarket trading Wednesday, to bounce off the previous sessions 2 12-month closing low, after the human resources outsourcing services company reported fiscal first-quarter profit that beat expectations and raised the full-year outlook, citing notable strength in mid-market, retirement and HR solutions businesses. Net income for the quarter to Aug. 31 rose to 379.2 million, or 1.05 a share, from 333.6 million, or 92 cents a share, in the year-ago period. 