A few weeks back, new entrant Navi Mutual Fund created a buzz with its first offering—a Nifty50 index fund. At 0.06%, it has the lowest expense ratio among all index funds. Other index funds tracking either the Nifty 50 or BSE Sensex charge 0.3% in direct plans, on average. With several newer fund houses lining up offerings in this area, we could see a scramble for launching lower-cost index funds. This is just one part of the story. Index