Rates on U.S. government debt fell further Monday morning after construction- and manufacturing-related data came in below economists’ estimates. In data released on Monday, U.S. construction spending fell 0.1% for the month of April versus economists’ forecast for a 0.2% gain. In addition, the Institute for Supply Management’s manufacturing purchasing managers index came in at 48.7%, or below the median forecast of 49.6%, as the sector contracted for a second straight month. Traders are looking ahead to Friday’s release of the official jobs report for May, which is expected to show a 178,000 gain versus 175,000 in the prior month,...