https://www.reuters.com/article/five9-m-a-zoom-video-commn-research/zooms-stock-drop-likely-nixed-five9-deal-say-analysts-idUSKBN2GR3JB >A slump in Zoom Video Communications Inc's share price likely limited its ability to sweeten a nearly $15 billion all-stock offer for call center software firm Five9 and led to the deal's collapse, Wall Street analysts said on Friday.