Sensex settles about 400 points below day's high; Nifty closes at 25,300

1. What happened

   According to a Moneycontrol.com headline, the Sensex settled about 400 points below the day's high, and the Nifty closed at 25,300.

2. When it started

   The date of the trading session is not given in the material provided, so the exact day is unknown.

3. How it spread

   The story is a market report from Moneycontrol.com, reached through a Google News link. The full article text was not provided.

4. Why it matters

   The headline says the report covers the key reasons markets pared gains, but those reasons are not in the material provided and cannot be summarised here.