THE irony was amusing. Five days after M.G. Damani, president of the Bombay Stock Exchange (BSE) wrote to the Finance Minister, P. Chidambaram, warning him about the aggressive buying by foreign institutional investors (FIIs) in a few select scrips, ("Our markets have virtually become FII-driven, which is dangerous," he wrote), Damani was one of the speakers at a seminar on book-building, a concept that will invariably give foreign institutional investors (FIIs) a powerful hold on even the primary markets.