Multi Commodity Exchange's decision to extend its licence and maintenance contract with 63 Moons Technologies for six more months comes as a nasty surprise to institutional investors who were assured by the management that the bourse was on track to fully migrate to the new trading platform by end-June. Domestic institutions—mostly mutual funds—own around 37 percent in MCX, and foreign institutions around 27 percent. The MCX stock too had rallied 24 percent since hitting a low of Rs 1,320 in late May, as the market was betting on a smooth transition.