on a losing streak

Suffering a consecutive series of defeats, losses, or instances of ill fortune. Everyone thought the team would win the championship for a second straight year, but they've been on a losing streak since the very beginning of the season. After seeming to be stuck on a losing streak in the smartphone market, the tech giant finally found global success with its latest device. Yet another company that I invested in crashed and burned. I am on one heck of a losing streak in the stock market.