We examine the performance of a sample of funds of HDFC Mutal Fund which is the largest private sector mutual fund in India. We examine a very popular risk adjusted metric used to evaluate the performance of mutual funds. This metric typically measures only the downside risk and is called the Sortino ratio. This ratio addresses the problem of using standard deviation as a measure of risk as it only takes into account the downward deviations. This is useful for an investor in selecting in mutual fund which matches his/her risk profile. Our sample comprises funds of different categories like Debt, Hybrid, Equity Linked Savings Schemes (ELSS), Equity Funds and Solution Oriented Funds. Our results show that generally their performance has deteriorated in the last one year. Comparatively, these funds had performed better in the last three and five years. Keywords: HDFC Mutual Fund, Standard Deviation, Sharpe Ratio, Downward Risk, Sortino Ratio