The stellar debut could presage a strong opening for online dating company Match Group Inc, which debuts later in the day. The debut comes at a time when slowing global growth and uncertainty about the timing of a U.S. interest rate hike have kept investors on edge. Competition is also intensifying in the mobile payments market, with Apple Inc launching its Apple Pay service, Amazon.com Inc exploring in-store payments, and start-ups such as Stripe Inc entering the fray.