Yelp. It’s the name of a social-media site that provides consumer reviews, particularly of restaurants. It’s also the sound shareholders have been making if they bought and held.
The company went public in March at $15 (U.S.) a share and popped to $24.58; at month’s end, it approached $32. But by June, it had more than halved to just over $14. Then four weeks later, it had nearly doubled.