Infosys shares fell on Monday to emerge among top Nifty losers, after the IT services major reported weaker-than-expected fiscal second quarter earnings and lowered its FY27 revenue growth guidance. Brokerages UBS and HSBC offered contrasting outlooks, with UBS projecting a 23 percent upside and HSBC flagging risks to margins and revenue growth. Infosys stock was trading down 1 percent at Rs 1,143 on NSE, after falling as much as 4 percent earlier in the morning.