The Trump administration has delivered a fresh jolt to global tech talent mobility by imposing a $100,000 fee on all new H-1B visa applications, effective September 21, which puts Indian IT majors with deep US exposure such as TCS, Infosys, Wipro, HCL Tech, Tech Mahindra, LTIMindtree at risk. The Nifty IT index faces key support at 35,500.