A lump sum is a one-time investment of a whole amount in a fund, bought at a single day's NAV.
A lump sum puts all the money into a fund at once. If you invest ₹2 lakh and the NAV that day is ₹40, you receive about 5,000 units, less a small stamp duty.
The alternative is a SIP, which invests a fixed amount at regular intervals. Both buy the same fund. They differ in timing:
A third route spreads a lump sum over time. The money goes into a liquid or debt fund, and a fixed amount moves each month into an equity fund through an STP.
Each fund sets a minimum for a first purchase and for additional ones, usually between ₹100 and ₹5,000. Additional purchases can go into the same folio as an existing SIP.
SIP or lump sum compares how the two behave when markets rise and fall.
Each fund page has its returns, risk, costs, managers and everything it holds.