FNOAI — Option chain

BANKNIFTY

56,359

close of Fri 18 Sep

future

56,527

the future is 168 points above the index

at the money

56,500

strikes 100 apart

heaviest call

58,000

+1,641 from spot

heaviest put

57,500

+1,141 from spot

puts to calls

0.97

on open interest, whole chain

expiry

29 Sep

11 days away

Option chain · BANKNIFTY

NIFTY BANKNIFTY SENSEXCSVFri 18 Sep 2026

Strikes±5 ±10 ±20Expiry09-29 10-27 11-23 12-29

10 strikes either side of the money. the heaviest call strike is 58,000 and the heaviest put strike is 57,500 — one of them sits outside this band and is pinned to the edge with its distance, rather than clipped.

Calls				Strike	Puts
What happened	Price	Change in OI	Open interest		Open interest	Change in OI	Price	What happened
short covering	1,172.25	−2,430	51,270	55,500	5,83,350	+1,42,560	154.15	short build-up
short covering	1,081.00	−1,860	21,180	55,600	86,790	+11,970	173.70	short build-up
short covering	1,007.05	−4,710	26,130	55,700	1,07,760	+20,340	193.80	short build-up
short covering	932.45	−6,690	54,870	55,800	1,43,580	+16,380	218.05	short build-up
long build-up	858.00	+17,760	74,400	55,900	1,50,930	+34,080	243.05	short build-up
short covering	788.60	−62,580	4,05,600	56,000	9,41,550	+1,00,950	271.00	short build-up
short covering	721.85	−64,410	85,230	56,100	1,87,860	+39,720	302.50	short build-up
short covering	656.70	−40,410	1,37,100	56,200	2,28,000	+58,140	336.40	short build-up
short covering	595.80	−33,360	2,08,320	56,300	3,12,360	+90,300	373.70	short build-up
short covering	536.05	−13,620	1,84,320	56,400	1,69,020	+58,950	414.60	short build-up
short covering	480.05	−19,530	6,27,270	56,500at the money	6,74,220	+1,03,080	460.10	short build-up
short covering	427.95	−20,220	1,48,470	56,600	1,49,490	+38,520	508.50	short build-up
short covering	380.25	−9,000	1,58,040	56,700	1,37,460	+7,320	560.40	short build-up
long build-up	336.70	+17,550	2,44,230	56,800	1,02,240	+4,140	613.50	short build-up
short covering	295.30	−780	1,81,320	56,900	94,170	−1,050	672.00	long unwinding
short covering	259.80	−49,050	10,76,340	57,000	6,99,360	+2,280	737.95	short build-up
short build-up	225.45	+14,430	1,80,540	57,100	74,490	+2,250	803.30	short build-up
long unwinding	195.55	−15,510	2,06,400	57,200	91,470	−3,690	870.95	long unwinding
long unwinding	169.75	−12,480	1,66,740	57,300	78,330	−3,960	944.25	long unwinding
long unwinding	146.10	−24,930	2,42,310	57,400	1,43,700	−3,630	1,020.35	long unwinding
long unwinding	126.70	−7,09,770	14,24,400	57,500	wall15,08,730	−72,870	1,104.30	long unwinding
long unwinding	58.15	−96,630	16,33,350wall	58,00015 strikes away	7,47,990	−13,350	1,539.70	long unwinding

For NIFTYthe money is at 56,500; the heaviest call strike is 58,000 and the heaviest put strike is 57,500; puts and calls are close to even across the chain, at 0.97; whether the heaviest strike has acted as a barrier was tested and did not hold upfalling

How often price has come this far

Fri 18 Sep 2026

How far out	A strike above	A strike below	Its own price implied	Either side	Past cases
0.25×	83 in 100	78 in 100	84 in 100	100 in 100	2,158
0.50×	66 in 100	61 in 100	69 in 100	99 in 100	2,158
0.75×	53 in 100	49 in 100	56 in 100	91 in 100	2,158
1.00×	41 in 100	39 in 100	43 in 100	76 in 100	2,158
1.25×	30 in 100	31 in 100	33 in 100	60 in 100	2,158
1.50×	21 in 100	24 in 100	24 in 100	45 in 100	2,158
2.00×	11 in 100	13 in 100	12 in 100	24 in 100	2,158
3.00×	4 in 100	3 in 100	2 in 100	7 in 100	2,158

How far out

A strike above

A strike below

Its own price implied

Either side

Past cases

0.25×

83 in 100

78 in 100

84 in 100

100 in 100

2,158

0.50×

66 in 100

61 in 100

69 in 100

99 in 100

2,158

0.75×

53 in 100

49 in 100

56 in 100

91 in 100

2,158

1.00×

41 in 100

39 in 100

43 in 100

76 in 100

2,158

1.25×

30 in 100

31 in 100

33 in 100

60 in 100

2,158

1.50×

21 in 100

24 in 100

45 in 100

2,158

2.00×

11 in 100

13 in 100

12 in 100

24 in 100

2,158

3.00×

4 in 100

3 in 100

2 in 100

7 in 100

2,158

How often price has actually come to a strike that many implied moves from where it started, beside what the option’s own price implied at the time, over the contracts this board's own expiry belongs with (8-21 days to expiry). That implied figure is for ONE side, so it is what each of the two side columns is read against; the last count is for either side and has no figure beside it, because the chance of reaching one of two is not twice the chance of reaching one. Over this history, a strike that far above was reached about 41 times in 100, over 2,158 past cases; its own price implied about 43.

What the premium has done as expiry came

Fri 18 Sep 2026

Calls

How far out of the money	15 sessions left	7 sessions left	2 sessions left
at the money	87%	67%	38%
in the money	84%	77%	62%
1 to 2% out of the money	83%	61%	25%
2 to 4% out of the money	66%	41%	12%
more than 4% out of the money	48%	21%	5%

How much of the premium was still there, measured from 30 sessions before expiry on the same contract — never across a roll, where the change of contract would show up as decay. At at the money and 7 sessions left, about 67% of the premium was still there, over 507 past cases; a quarter of the time it was worth more than when it was written.

Puts

How far out of the money	15 sessions left	7 sessions left	2 sessions left
at the money	49%	28%	9%
in the money	67%	50%	38%
1 to 2% out of the money	45%	23%	7%
2 to 4% out of the money	44%	18%	5%
more than 4% out of the money	48%	17%	5%

How much of the premium was still there, measured from 30 sessions before expiry on the same contract — never across a roll, where the change of contract would show up as decay. At at the money and 7 sessions left, about 28% of the premium was still there, over 506 past cases; a quarter of the time more than 97% was still there.

Where open interest moved most

Calls — biggest changes

57,500−7,09,770long unwinding

58,000−96,630long unwinding

56,100−64,410short covering

Puts — biggest changes

55,500+1,42,560short build-up

56,500+1,03,080short build-up

56,000+1,00,950short build-up

How the chain is positioned

calls, open interest1,48,96,710−15,32,490puts, open interest1,44,90,240+10,34,940max pain57,100implied move1.67%to expiry

puts and calls are close to even across the chain, at 0.97.

cheapdear

option prices are dearer than 45 of the past 252 sessions

fewer putsmore puts

about as many puts against calls as usual for this market

For NIFTYheaviest call strike 58,000; heaviest put strike 57,500; the call wall has held falling

What the front future did

CSV

Session	Close	Change	Open interest	What it reads as
Fri 18 Sep	56,527	+217.0	−70,860	short covering
Thu 17 Sep	56,310	−97.8	−27,150	long unwinding
Wed 16 Sep	56,408	+328.4	−52,770	short covering
Tue 15 Sep	56,079	−789.8	+34,710	short build-up
Fri 11 Sep	56,869	+273.0	+840	long build-up

Session

Change

Open interest

What it reads as

Fri 18 Sep

56,527

+217.0

−70,860

short covering

Thu 17 Sep

56,310

−97.8

−27,150

long unwinding

Wed 16 Sep

56,408

+328.4

−52,770

short covering

Tue 15 Sep

56,079

−789.8

+34,710

short build-up

Fri 11 Sep

56,869

+273.0

+840

long build-up

Price and open interest read together, on the nearest contract that has not expired. A session where the contract changed carries no change, because the two contracts are different instruments at different prices.

What the board is, and is not

Open interest and its change are the exchange's end-of-session numbers. The action beside each strike names what the price and the open interest did together — long build-up, short build-up, long unwinding, short covering — and is a description of the session, not a forecast. The heaviest call and put strikes are shown even when they sit outside the displayed band, marked as such, because clipping them to keep the row count tidy would hide the two numbers the board exists for.

The 1-minute live version of this same board is on its way. It will run the identical code over the live stream, which is why this one computes nothing a replay could not reproduce.