TransAlta (TAC) Options Chain

NYSE: TACUtilitiesElectric Utilities: CentralUSD

13.13+0.24 (+1.86%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Mar 19, 2027
Days to expiration: 159
Share price: $13.13
Put/call ratio (OI): 0.02
Put/call ratio (volume): 0.54
ATM implied volatility: 54.6%
Expected move: ±$4.73
Open interest (C / P): 2.31K / 44

TAC options summary

The TAC options chain for the March 19, 2027 expiration lists 11 call and 5 put contracts, with 159 days until expiration. Open interest stands at 2,305 calls and 44 puts, a put/call ratio of 0.02, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $13.00 strike is 54.6%, which implies the market expects a move of about ±$4.73 (36.0%) in TransAlta stock by expiration.

The most open interest sits at the $15.00 call (1.00K contracts) and the $13.00 put (11 contracts).

Summary generated from market data by MetaCap's automated system. Methodology

TAC options chain · March 19, 2027

TAC calls and puts by strike price. Shaded cells are in the money.
Calls							Puts
OI	Vol	IV	Last	Bid	Ask	Strike	Bid	Ask	Last	IV	Vol	OI
3	2	52.3%	5.00	4.50	6.00	8.00	—	—	—	—	—	—
4	4	74.4%	4.20	3.60	4.80	9.00	0.00	0.45	0.39	50.0%	—	6
16	3	64.7%	3.30	2.70	3.90	10.00	—	—	—	—	—	—
8	1	61.9%	2.15	2.10	3.20	11.00	0.45	0.65	0.58	46.7%	2	8
11	3	53.9%	1.83	1.65	2.40	12.00	0.05	1.40	1.00	58.0%	7	9
100	1	53.4%	1.75	0.65	1.90	13.00	0.45	1.85	2.00	55.8%	1	11
TAC $13.13
1,003	5	54.1%	0.90	0.50	1.20	15.00	2.50	2.90	2.78	49.1%	3	10
2	—	56.4%	0.30	0.10	0.80	17.00	—	—	—	—	—	—
150	1	51.6%	0.28	0.00	0.50	18.00	—	—	—	—	—	—
5	—	51.4%	0.10	0.00	0.75	19.00	—	—	—	—	—	—
1,003	4	55.8%	0.23	0.00	0.75	20.00	—	—	—	—	—	—

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 March 19, 2027 expiration, the TAC put/call ratio based on open interest is 0.02 (44 puts vs 2,305 calls), and 0.54 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 March 19, 2027 is about 54.6%, 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.