Detailed Analysis
When you have a large sum to invest (bonus, inheritance, maturity proceeds), the question is whether to invest it all at once or gradually.
Lump sum puts your money to work immediately. Since markets have an upward bias over time, deploying early means more time in the market. Studies show lump sum beats dollar-cost averaging about 65% of the time over 12-month periods.
STP transfers money gradually from a liquid/debt fund to equity over 3-12 months. While statistically suboptimal, it prevents the worst-case scenario: investing everything right before a major crash.