Tech stocks have been among the key drivers pushing markets higher in recent years. But the types of companies driving those gains have been changing. TD Asset Management's Vitali Mossounov, says from an investment perspective it's important to focus on companies who have a track record of innovation. Full video here: https://www.moneytalkgo.com/video/from-clouds-to-chips-is-the-tech-sector-entering-a-new-phase-for-…