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Nifty September F&O Setup: Lowest ever FII long exposure at the start of a seriesHistorically, September has been a good series for the Nifty, with three out of the last four years, resulting in gains. Incidentally, it was at the end of the September series of 2024, that the Nifty had made its record high of 26,277, a level it has not managed to see again till date.By CNBCTV18August 29, 2025, 8:05:50 AM IST (Updated)2 Min ReadThe Nifty 50 index heads into the September series after two consecutive ones with losses. August also ended on a negative note for the index as it gave up key support levels enroute to further downside after the 50% tariffs threatened by the US administration took effect on Wednesday.

The Nifty 50 index has lost nearly 1,000 points on in the last two series.

A key highlight at the start of the September series is that the long exposure of foreign institutions is at the lowest ever. FIIs are currently net short at 1.68 lakh contracts.

MonthFII Longs In Futures (%)September8August10July38June20May41April40

However, extreme short positions for FIIs at the start of the series have also resulted in a strong upmove on the Nifty in the subsequent series.

SeriesLong PositionsSubsequent Nifty MoveAugust 20239%2,579 Points In Next Four SeriesNovember 202311%2,921 Points In Next To SeriesFebruary 202511%2,300 Points In Next Five Series

Historically, September has been a good series for the Nifty, with three out of the last four years, resulting in gains. Incidentally, it was at the end of the September series of 2024, that the Nifty had made its record high of 26,277, a level it has not managed to see again till date.

September Series YearReturns (Points)Returns (%)20219815.92022-704-420232701.420241,0644.2

At the start of the September series, Nifty's rollovers stand a 83.6%, which is higher than the three-month average of 78.1%, and also higher than the 75.7% at the start of the August series.

SeriesRolloversSeptember83.6%August75.7%July79.5%June79.1%May79.1%

Here are some of the key triggers that lie ahead of the Nifty at the start of the September series:

Reliance Industries AGM on August 29

GST council meeting on rate rationalisation on September 3-4

Any progress on India-US trade talks and tariffs

US Federal Reserve meeting outcome on September 17

Pre-festive buying

Impact on demand due to heavy floods in North India

Continue ReadingFirst Published: Aug 29, 2025 7:48 AM ISTCheck out our in-depth Market Coverage, Business News & get real-time Stock Market Updates on CNBC-TV18. Also, Watch our channels CNBC-TV18, CNBC Awaaz and CNBC Bajar Live on-the-go!TagsniftyNifty 50share market today