Billionaire Uday Kotak expressed concerns over the US government's rising debt straining its resources. "A crucial macro factor today is US 10-year bond yields. They've moved up from 4.16% on January 1 to 4.60%. It reflects increasing strain for US borrowing program as US debt nears $40 trillion," Kotak said. "When US sneezes, the world gets a cold," he added.