John Zimmer, co-founder and president of Lyft Inc., left, and Logan Green, co-founder and chief executive officer of Lyft Inc., stand for a photograph. (Photographer: Kyle Grillot/Bloomberg)

Lyft Short Bets Are Now Most Expensive in U.S., Markit Says

(Bloomberg) -- A surge in demand for short positions in Lyft Inc., the ride-sharing company that went public last week, has made it the most expensive bearish bet in the U.S. equity market.