Shares of iRobot Corp. initially jumped 10% then cooled in after-hours trading Wednesday after the company posted quarterly results that topped analysts’ revenue and earnings estimates. IRobot IRBT, +4.30% reported a fiscal fourth-quarter net loss of $63.6 million, or$2.28 a share, compared with a net loss of $84.1 million, or$3.07 a share, in the same quarter a year ago. Adjusted earnings were a loss of $1.82 a share. Revenue dropped to$307.5 million from $357.9 million in the year-ago quarter. Analysts ...