China cut interest rates for the third time in six months on Sunday in a bid to lower companies’ borrowing costs and stoke a sputtering economy that is headed for its worst year in a quarter of a century. The People’s Bank of China (PBOC) said on its website it was lowering its benchmark, one-year lending rate by 25 basis points to 5.1 percent from May 11. It cut the benchmark deposit rate by the same amount to 2.25 percent. “China’s economy is still facing relatively big downward pressure,” the PBOC said.