Indian software services exporter LTIMindtree bagged a $450 million multi-year deal, its largest ever, the company said on Monday. Its shares rose as much as 7.7 per cent. They were trading about 6 per cent higher before the news, tracking a broader IT sector rally on easing global recession worries. LTIMindtree said the customer was a global agribusiness company, without disclosing the name. The deal comes at a time when larger peers are struggling to secure mega deals as macroeconomic