Five9 is trading 4.41% higher at $34.54, but available evidence does not establish why shares are rising on October 15. - Shares rebounded after declining 6.58% on October 14. - Five9’s listed press releases show an October 13 inducement-award notice, not a new catalyst today. The broader software sector is down, so sector weakness does not explain the gain. - No trading-volume information was verified.