Uber and Lyft have awful debuts Unlisted Video

The US initial-public-offering market has been packed with high-profile debuts of all sizes this year. But some of the most widely anticipated launches have faltered in their early days of trading. At the heart of the poor showings are companies' unclear paths to profitability and an uncertain economic backdrop, according toanalysts and investment advisors. Visit Markets Insider's homepage for more stories. On the surface, the US initial-public-offering market is sizzling.