Indian stocks: Nifty tops 23,000 as Sensex gains 650 points

1. What happened

   According to a Moneycontrol live-updates headline, the Nifty rose above 23,000 and the Sensex gained about 650 points, with IT and oil and gas stocks rallying.

2. When it started

   The source does not give a date or time. The headline describes a live market update, so the figures reflect a single trading session.

3. How it spread

   The story is a live-blog style report on intraday index moves, reached through a Google News link to Moneycontrol. The headline gives no further detail on individual companies or trading volumes.

4. Why it matters

   The headline does not state what drove the rally. Causes were not given in the source, so they cannot be confirmed from it.