Stock Market Today: Sensex opens 400 points down, Nifty under 25,900; Bharti Airtel, IndiGo shine early

Stock Market Today: The Indian markets opened on a negative note on 09 December as global sentiment stayed weak. The benchmark indices slipped in early trade, tracking declines across major Asian markets and muted cues from US futures.

The Sensex opened at 84,742.87, slightly above its day’s first tick, but remained under pressure. The index fell 365.12 points, or 0.43 per cent, to 84,737.57 at 9:16 am. The previous close was 85,102.69.

The Nifty also opened lower at 25,867.10 against the previous close of 25,960.55. The index fell 82.25 points, or 0.32 per cent, to 25,878.30 in the first few minutes of trade.

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Key Levels for Nifty

Zee Business Managing Editor Anil Singhvi says 25,850 has become the strongest support zone for Nifty in the past three weeks. The index has tested this level many times but has not closed decisively below it. This has made the 25,850–25,900 band a key reference point for traders.

Since 18 November, Nifty has taken major support in the 25,850–25,900 range several times. In fact, Nifty has closed inside the 25,843–25,893 range six times, showing strong buying interest at these levels.

Singhvi suggests a big fall will come only if Nifty closes below 25,825, which is the lower threshold of this support area.

Here are the recent Nifty lows that show how the index has been respecting this range:

3 December 2025 – Low: 25,891.0

8 December 2025 – Low: 25,893.4

18 November 2025 – Low: 25,876.5

19 November 2025 – Low: 25,856.2

25 November 2025 – Low: 25,857.5

26 November 2025 – Low: 25,843.0

This repeated behaviour signals that the zone near 25,850 is acting as the most reliable floor of this market phase. If the index manages to hold above it, traders expect stability. But if Nifty slips decisively below 25,825, the next leg of correction could open up.