Home › Comparisons

Weekend theta vs weekday theta: is selling on Friday a free weekend?

A popular idea says sell options on Friday and collect the weekend's time decay while markets are closed. In practice, option prices tend to fall ahead of the weekend, so a Friday seller often sells at a price that already has much of it removed, and still carries two nights of news risk.

Comparison · 6-minute read · Updated 2026-10-27

The short answer

Theta is how much an option's price is expected to drop from one day to the next, if nothing else changes. Most platforms show it per calendar day.

The weekend has two calendar days with no trading. So the idea goes: sell on Friday, and Monday's price will be three days cheaper, for free.

The catch is that everyone knows the weekend is coming. Market makers set prices with it in mind. Much of the weekend's decay tends to show up in prices before the Friday close, not on Monday morning. And the seller still holds the risk of weekend news.

Side by side

Why the weekend gets priced in early

Option prices aren't set by a calendar. They're set by buyers and sellers, many of them professional market makers. They know the weekend is coming. Nobody wants to hold an option over Friday night at a price that will obviously be lower on Monday.

So prices tend to drift lower through Friday, and sometimes earlier in the week. By the time you sell on Friday afternoon, part of the weekend's decay may already be taken out of the price you get.

How much, and when, varies by stock, by how close expiry is, and by how calm the market is. We're not aware of a rule you can count on. You can check it on your own chain: write down a quiet option's price Friday at noon, at the close, and Monday at the open, and compare.

A worked example (an illustration, not a trade idea)

A made-up stock, XYZ, trades at $50. A 2-week $47 put shows a theta of about $0.04 per share per day.

The Friday-seller plan: sell at the close, collect three days of decay, about $0.12, by Monday.

What a seller might see instead:

• Friday morning, the put is $1.08.
• By Friday's close, it has drifted to $1.00, with the stock unchanged. That's when you sell. You collect $100.
• Monday's open, stock still at $50, it's $0.96.

So the "free weekend" paid about $4 on Monday, not $12. Some of the weekend decay went to whoever sold on Friday morning.

Now the part people skip: what if the weekend isn't quiet?

The upside of the weekend is a few dollars of decay. The downside is a gap you can't react to until Monday. That's not a reason to never hold over a weekend. Every seller of a 30-day option holds over four of them. It's a reason not to sell because it's Friday.

Does the day you sell matter at all?

Less than the myth says. What matters more:

• The strike and the date. Those set how much risk you're taking for the premium.
• The price you get. A good fill near the middle beats a lucky day of the week.
• The news calendar. An earnings report or a big economic release inside the trade matters far more than which weekday you started.

If you sell monthly options in the wheel strategy, pick the date and strike first. Then sell when the fill is good, any day of the week. Our theta decay guide shows how decay speeds up near expiry, which matters far more than weekends.

When the weekend does matter

• Very short options. On an option with a few days left, the weekend is a big share of its life. Its price will reflect that, and a weekend gap hits it hard.
• Event weekends. Elections, big policy meetings or company news expected on a Saturday can cause Monday gaps.
• Positions near your strike. If you're close to the money on Friday, the weekend is risk, not decay. Consider whether to close. See buy to close vs letting it expire.

In Canada, US options in a TFSA or RRSP follow the same US market hours, and options permissions differ by broker.

Questions