TAIPEI, March 12 : Total assets under management in Taiwan’s investment fund industry are expected to grow by more than a third to T$30 trillion ($968 billion) within the next three years, the chairman of Taiwan's investment fund industry association said in a recent interview.       The forecast represents a nearly 36 per cent jump from the current T$22 trillion, reflecting a shift in local investment habits from single stock selection to exchange-traded funds (ETFs) that provide broader