If given enough time to grow, investment in the NPS can transform the life of investors. ET Wealth identifies the best performing NPS funds to help investors decide which pension fund manager they should opt for. Don’t look at the annualised returns in isolation. They are point-to-point returns and may not give the correct picture. The SIP returns, which are calculated using the internal rate of return formula, will be a better indicator, especially if you intend to invest through monthly SIPs.