Tensions over Hong Kong unnerve world stocks, oil tumbles

LONDON (Reuters) - World stocks took a hit on Friday as China moved to impose a new security law on Hong Kong after last year's pro-democracy unrest, further straining fast-deteriorating U.S.-China ties. These tensions plus news that China has dropped its annual growth target for the first time added to concern about the fallout from the COVID-19 pandemic, knocking oil prices down more than 5% and boosting demand for safe-havens such as U.S. government bondsEuropean shares opened broadly..