Hedge fund billionaire says US debt 'is a growing concern that cannot be overlooked'

Citadel founder and CEO Ken Griffin sounded the alarm about the growing U.S. national debt in his annual letter to investors in his hedge fund that was published Monday.Griffin pointed to recent projections by the nonpartisan Congressional Budget Office (CBO) that show the national debt rising to historic levels due to higher spending on interest to service the debt, while annual budget deficits are forecast to grow despite a strong labor market."As we have cautioned over the past year, the surg