TransAlta (TAC) Options Chain
NYSE: TACUtilitiesElectric Utilities: CentralUSD
Market open · Delayed 15 min · as of Oct 9, 10:04 AM ET
Expiration date
- Expiration
- Oct 16, 2026
- Days to expiration
- 7
- Share price
- $12.84
- Put/call ratio (OI)
- 0.37
- Put/call ratio (volume)
- 0.11
- Expected move
- ±$1.30
- Open interest (C / P)
- 662 / 246
TAC options summary
The TAC options chain for the October 16, 2026 expiration lists 4 call and 4 put contracts, with 7 days until expiration. Open interest stands at 662 calls and 246 puts, a put/call ratio of 0.37, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $13.00 strike is 73.2%, which implies the market expects a move of about ±$1.30 (10.1%) in TransAlta stock by expiration.
The most open interest sits at the $13.00 call (394 contracts) and the $12.00 put (215 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
TAC options chain · October 16, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 9.00 | 0.00 | 0.75 | 0.05 | |||||
| 1.00 | 0.55 | 1.25 | 12.00 | 0.00 | 0.20 | 0.51 | |||||
| 0.30 | 0.00 | 0.75 | 13.00 | 0.05 | 0.75 | 0.41 | |||||
| 0.14 | 0.00 | 0.15 | 14.00 | — | — | — | |||||
| 0.05 | 0.00 | 0.75 | 15.00 | 1.80 | 2.50 | 3.31 | |||||
In-the-money callsIn-the-money puts. IV = implied volatility, OI = open interest (contracts). Each contract covers 100 shares. Quotes delayed at least 15 minutes.
Frequently asked questions
What is the TAC put/call ratio?
For the October 16, 2026 expiration, the TAC put/call ratio based on open interest is 0.37 (246 puts vs 662 calls), and 0.11 based on today's volume. A ratio above 1 means more puts than calls.
What is TAC's implied volatility?
At-the-money implied volatility for TAC options expiring October 16, 2026 is about 73.2%, an annualized estimate of how much the market expects TransAlta stock to move.
How many TAC option expiration dates are there?
TAC has 4 listed expiration dates, from Oct 16, 2026 to Mar 19, 2027.
What does "in the money" mean?
A call is in the money when the strike price is below the current share price; a put is in the money when the strike is above it. In-the-money contracts have intrinsic value and are shaded in the table.