Quest Software (NASDAQ:QSFT) shares are on the rise, up 1.4% despite the broader market’s pullback, as speculators buy shares to bet the tech company will overcome a $23 per share bid from Insight Venture Partners.Last week shareholders filed a suit against Quest, accusing its CEO Vinny Smith of avoiding SEC investigation into Quest’s accounting.Quest is defending itself by way of a proxy filing that details the events leading to the LBO deal.