Dalal Street is heading into the new trading week with global uncertainty firmly in focus, as investors keep a close watch on the evolving situation in the Middle East, fluctuations in crude oil prices and the behaviour of foreign investors. Analysts said that sentiment is likely to remain fragile and heavily influenced by developments in negotiations between the United States and Iran, while movements in the rupee, global equities and the US dollar are also expected to shape market direction in the days ahead.