The capital put in by alternative investment funds (AIFs) has risen to nearly Rs 75,000 crore at the end of April-June quarter of the current fiscal, a surge of 90 per cent from the year-ago period. AIFs are a class of pooled-in vehicles for investing in real estate, private equity and hedge funds and over 270 such funds are registered with the Securities and Exchange Board of India (Sebi) since 2012.