TATAPOWER around the money
| Strike | Call OI | Call LTP | Put LTP | Put OI |
|---|---|---|---|---|
| 340 | 2,23,300 | 26.8 | 0.5 | 9,17,850 |
| 345 | 2,95,800 | 22.75 | 0.85 | 10,12,100 |
| 350 | 15,92,100 | 17.5 | 1.3 | 28,14,450 |
| 355 | 19,50,250 | 13.6 | 2.15 | 28,62,300 |
| 360 | 22,18,500 | 10 | 3.5 | 48,37,200 |
| 365 ATM | 23,60,600 | 7.15 | 5.5 | 19,89,400 |
| 370 | 37,00,400 | 4.95 | 8.25 | 25,85,350 |
| 375 | 24,65,000 | 3.35 | 11.75 | 14,36,950 |
| 380 | 41,32,500 | 2.35 | 16.65 | 23,47,550 |
| 385 | 31,91,450 | 1.65 | 19.7 | 2,21,850 |
| 390 | 17,44,350 | 1.2 | 24.45 | 3,45,100 |
Where TATAPOWER open interest sits
The heaviest call open interest is at the 400 strike, holding 65,49,650 contracts — 18.8% of all TATAPOWER call open interest on the board, 9.68% above the spot of 365. Call open interest concentrated above price is commonly read as resistance, on the reasoning that writers there are defending the level. It is a crowding observation, not a rule — the level holds until that open interest unwinds.
On the put side the weight is at 360 with 48,37,200 contracts, 17.0% of TATAPOWER put open interest, 1.29% below spot. Put open interest concentrated below price is usually treated as support for the same reason, and breaks the same way.
New to this? Read the Open Interest guide — how to read it, with worked examples.
What TATAPOWER's PCR is saying
TATAPOWER is carrying 2,85,09,900 contracts of put open interest against 3,48,69,600 of call, a put-call ratio of 0.82 — broadly balanced positioning. PCR has no universally good value; it is read against its own recent range, and the direction it is moving carries more than the level.
It opened the session at 0.82 and has held to 0.82 — a move of 0.00. That is effectively flat: positioning has not changed sides today.
New to this? Read the PCR guide — how to read it, with worked examples.
TATAPOWER against its max pain
Max pain for TATAPOWER computes to 370, with spot at 365 — 1.45% below it. That strike is where the total value of all open contracts expiring would be lowest. It is arithmetic on the current open interest distribution, not a forecast, and the distribution keeps changing.
The curve is defined around it: the nearest strike either side costs writers 3.7% more than 370. A trough that distinct is a stronger reference than a flat basin, though it still describes positioning rather than predicting settlement.
There are 21 sessions to expiry. This far out the figure moves as positions roll, and it is least informative early in a series — worth watching for direction of travel rather than as a target.
New to this? Read the Max Pain guide — how to read it, with worked examples.
What changed in TATAPOWER today
The biggest unwind is −1,450 put contracts at 315. Positions closing matters as much as positions opening — a level defended by open interest stops being defended when that open interest leaves, and a break through a strike that is unwinding is a different event from a break against one that is intact.
Change is measured against this session's opening snapshot rather than the previous close, so the overnight gap and the positions rolled at the open do not swamp the reading.
New to this? Read the OI Change guide — how to read it, with worked examples.
The move priced into TATAPOWER
The at-the-money straddle on TATAPOWER costs 12.65 — 7.15 for the call and 5.50 for the put at the 365 strike. That sum is what the market charges to be covered in either direction, which makes it the move being priced in: about 3.47% of spot, or roughly 352 to 378 by expiry on a breakeven basis.
The straddle has moved 0.0% since the open. That is close to flat, so today's decay and any volatility move have roughly offset.
Implied volatility at the money is 18.4% on the call and 17.6% on the put. The call carries 0.9 points more, which is the less common direction and points to upside being bid.
New to this? Read the ATM Premium guide — how to read it, with worked examples.
TATAPOWER — frequently asked questions
What is the TATAPOWER ATM strike today?
The at-the-money strike for TATAPOWER is 365, taken from a spot reading of 364.7 on the 29 Sep 2026 expiry. The ATM strike rolls as spot moves, so it is re-selected through the session rather than fixed at the open. It carries the highest time value of any strike, which is why decay is felt most sharply there.
Which TATAPOWER strike has the highest open interest?
The heaviest call open interest sits at 400 with 65,49,650 contracts, and the heaviest put open interest at 360 with 48,37,200 contracts. Those two strikes are commonly read as the working range — calls above spot as resistance, puts below as support. They are crowding observations, not guaranteed barriers.
What is open interest in options?
Open interest is the total number of option contracts in a strike that are still open and not yet squared off or settled. It counts positions, not trades. Rising open interest means fresh contracts are being created and new money is entering that strike; falling open interest means existing positions are being closed out.
Is this data live?
The table on this page is baked into the HTML and refreshed through the trading session, so it is readable without JavaScript and carries an as-of stamp. The interactive terminal above it streams live from the exchange feed and updates continuously while the market is open.
Do I need an account to use this?
No account or login is needed. Every tool on this site runs in your browser and is free to use. Nothing you select is stored on a server, and no order can be placed from here — Sahi is an analysis terminal, not a trading or execution platform.
TATAPOWER on the live tools
This article is the read. These pages are the terminal, each opening on TATAPOWER.