New Delhi, Jan. 16 -- Day trading has been under heightened scrutiny from the Securities and Exchange Board of India (Sebi), which has rolled out a series of measures to curb excessive speculation. The steps appear to be having the intended effect, at least among large-cap stocks, judging by a marked decline in sharp intraday price swings.

An analysis by Mint of intra-day movements among Nifty 100 companies in 2024 and 2025 shows that the number of instances where a stock moved more than 10% within a single session fell to 45 in 2025, less than one-fourth of the 198 recorded in 2024. Each stock day with an intraday move of 10% or higher is counted separately.

At the same time, the share of trades with less than 2% intra-day movement, in...