The Canada tariff odds on Kalshi just did something worth stopping for. The contract asking whether President Trump's 50% Section 338 tariffs on Canadian goods actually take effect on August 19 traded at 60 cents on Monday. By Tuesday afternoon it was bid 41, ask 43. That is not a market drifting on low volume; 2,764 contracts changed hands in 24 hours against 4,008 open interest, which means most of the position in this market got repriced in a single day. Traders are not debating whether the White House wants these tariffs. They are pricing the chance that a deal, a delay, or a carve-out lands in the final hours before the 12:01 a.m. ET deadline. This page tracks the whole Canada tariff board, the durable contracts that outlive Wednesday, and the settlement fine print that decides what a last-minute deal actually does to each one. That fine print is where the surprises live, and we will get to it.
The Quick Answer
As of Tuesday afternoon, August 18, 2026, Kalshi's take-effect contract (KXCANTARIFFSEFFECT-26) prices the 50% Canadian tariffs starting on schedule at 41 to 43 cents, down from 60 cents a day earlier. The sell-off followed reporting that Canada's lead negotiator warned her U.S. counterparts the August 19 tariffs risk halting trade talks, and that negotiations intensified into the deadline. The full board, the Section 338 legal mechanics, and what each deal scenario does to each contract are below.
The Canada Tariff Odds Board, As Of August 18, 2026
Five contracts make up the real Canada tariff complex on Kalshi right now. Prices are Yes bid/ask in cents, pulled Tuesday afternoon, August 18.
| Contract | The question | Bid / Ask | Last | Closes |
|---|---|---|---|---|
| KXCANTARIFFSEFFECT-26 | Do the 50% Section 338 tariffs begin applying to covered Canadian goods on Aug 19? | 41 / 43 | 41 | Aug 19, 11:59 p.m. ET |
| KXTARIFFSECTOR-27JAN01-CAN | Executive action imposing tariffs specifically on Canadian aircraft before 2027? | 15 / 25 | 20 | Dec 31, 2026 |
| KXTARIFFSECTOR-27JAN01-MINE | Executive action imposing tariffs specifically on critical minerals before 2027? | 32 / 41 | 40 | Dec 31, 2026 |
| KXTRUMPTARIFFHEAR-27JAN-X | Does the Supreme Court agree to hear a Trump tariff case before Jan 2027? | 14 / 19 | 20 | Jan 1, 2027 |
| KXTARIFFBILL-27JAN01 | Does any legislation imposing new or increased tariffs become law before Jan 1, 2027? | 46 / 50 | 75 | Jan 1, 2027 |
The row that tells you the most is not the headline one. Look at the legislation contract: last trade 75, bid/ask 46/50. That last print is stale, and anyone reading the last price instead of the live quote would think Congress passing a tariff bill is a 3-in-4 proposition when the live market says it is a coin flip. The take-effect market showed the same wrinkle in miniature on Tuesday, when a 47-cent last print hung above the ask for part of the afternoon before trades caught down to the bid, which is why this page quotes bid and ask everywhere. In thin politics markets, the quote is the market; the last trade is a memory.
Why The Take-Effect Market Sold Off From 60 Cents
The contract is pricing a very specific piece of paper. On July 20, 2026, Trump signed three proclamations under Section 338 of the Tariff Act of 1930, imposing an additional 50% tariff on Canadian dairy, alcoholic beverages, and motor vehicles, effective for goods entered on or after 12:01 a.m. ET on August 19. Law firm analyses of the proclamations put the covered trade at roughly $20 billion, about 5% of everything the U.S. imports from Canada; White & Case's client alert runs those numbers, and GHY International's customs advisory confirms the mechanics, with no exemption for USMCA-qualifying goods.
So why did a signed, dated proclamation trade down 17 cents in a day? Because the other side of the table started moving. The Globe and Mail reported that Canada's lead negotiator, Janice Charette, told U.S. Trade Representative Jamieson Greer that letting the August 19 tariffs bite could halt trade talks, with Ottawa unable to control how provinces respond. The open files in the negotiation are the same three categories the proclamations target: Canada's retaliatory auto tariffs, provincial restrictions on American alcohol, and dairy quotas. That symmetry is the whole trade. The proclamations read less like a settled policy and more like a negotiating position with a countdown clock, and the market moved from "policy" pricing in the 60s toward "negotiation" pricing in the low 40s as talks intensified into the deadline.
A price in the low 40s is not a prediction that the tariffs die. It says the market thinks it is slightly more likely than not that something interrupts the schedule, while leaving better than a 2-in-5 chance the trucks crossing at Windsor on Wednesday morning pay 50% more duty. Either way, this market stops trading at 11:59 p.m. ET Wednesday, staying open through the day so source-agency reporting can confirm whether the tariffs actually began applying, and then it settles fast. The reason this page exists is everything on the board that does not.
Section 338 Vs IEEPA: Why The Settlement Question Is Different This Time
Here is the context that makes the durable contracts interesting. Trump's first tariff regime ran on IEEPA, the International Emergency Economic Powers Act, and on February 20, 2026 the Supreme Court struck those tariffs down 6-3, ruling the statute does not delegate tariff power to the president. Section 338 is the replacement authority, and it is a different animal in three ways that matter for anyone holding a contract on this board.
First, it is explicit. Section 338 is a 1930 statute that directly authorizes the president to impose duties of up to 50% on countries found to discriminate against U.S. commerce. The delegation question that killed the IEEPA tariffs does not map cleanly onto it. Second, it has no expiration. Unlike other trade authorities with built-in time limits, Section 338 tariffs run until a president ends them, which is exactly why a page about them cannot expire on August 20 either. Third, it has never been used. The July 20 proclamations are the first invocation in the statute's 96-year history, which means there is no case law, and a legal challenge is close to certain if the tariffs take effect and stay on.
That third point is what the Supreme Court contract is actually pricing. KXTRUMPTARIFFHEAR-27JAN-X asks whether the Court agrees to hear a case primarily related to Trump tariffs before January 2027, and it trades at 14/19. The Court already decided the IEEPA question in February, so this contract is effectively asking whether the next round, a Section 338 challenge, gets to the justices on an expedited schedule the way the IEEPA case did. Fourteen to 19 cents for "cert granted in under five months on a statute that was first litigated this summer" is the market saying the courts move slower than the news cycle. Our Kalshi Supreme Court markets page covers how the Court's own docket markets price this kind of timing.
And the settlement mechanics cut one way that holders should understand now: the take-effect contract settles on whether the tariffs begin applying on August 19, per reporting from Kalshi's designated source agencies. If a court strikes Section 338 down in November, a Yes settlement from August does not reopen. Settlement is a snapshot, not a subscription, and that distinction is about to do a lot of work.
What A Deal, A Delay, Or A Carve-Out Does To Each Contract
This is the section the sell-off begs for, because "the tariffs get interrupted" covers three very different outcomes with three different settlement footprints.
A full deal before midnight. If Washington and Ottawa announce an agreement and the proclamations are withdrawn or suspended before 12:01 a.m. ET Wednesday, the take-effect contract resolves No, and the 41-cent bid was the right side. The knock-on trades are the durable ones: the Canadian aircraft contract at 15/25 is priced as an escalation market, and a comprehensive deal is the scenario that walks it toward zero. The critical minerals contract at 32/41 is broader than Canada, so a deal dents it without killing it.
A delay. This is the scenario the contract language decides, and it is stricter than intuition. The market asks whether the tariffs begin applying to covered Canadian goods on August 19, 2026, specifically. A proclamation that pushes the date to September 15 to let talks continue would mean the tariffs still happen and the contract still resolves No, because they did not begin on the 19th. If you own Yes as a bet on "Trump follows through eventually," you own the wrong contract; that thesis lives in the sector markets with December 31 deadlines, not in a one-day take-effect market.
A partial carve-out. The messy one. Suppose autos get exempted at the eleventh hour and dairy and alcohol proceed. The rules ask whether the tariffs established by the three proclamations begin applying to covered Canadian goods on the 19th, and in that scenario some covered goods pay while others do not. Our read is that any of the three proclamations taking effect on schedule puts strong pressure toward Yes, but this is precisely the kind of edge case where the one-line market summary and the full rules document can point in different directions, and where settlement review exists for a reason. If your position only profits in a carve-out world, read the full rules PDF before the close, not after.
Talks collapse and the tariffs bite. Yes settles, and the action rotates to the rest of the board. Remember that $20 billion figure: these proclamations cover about 5% of Canadian imports, which leaves 95% of the trade relationship as room for escalation. That is what the aircraft contract is for; Canadian aircraft are the named next target in the sector series, and a halt to talks is the scenario that reprices it the way the take-effect market just repriced. The legislation contract at 46/50 is the slowest burn on the board, asking whether Congress itself puts new tariffs into law by January 1, a separate question from anything a proclamation does, and one reason the tariff-revenue stimulus market trades at all.
The one I keep coming back to is the aircraft contract. It has the widest spread on the board at 10 cents, which is the market telling you nobody has strong information yet, and it is the single cleanest expression of "Wednesday goes badly" that survives past Wednesday.
How To Read This Board Without Getting Clipped
Two practical notes for anyone trading any of these, both of which the take-effect market demonstrated this week. Spreads on the politics board run wide; the headline market's 2-cent spread is tight by this board's standards, and the sector contracts trade 9 and 10 cents wide. In dollar terms, buying the aircraft contract at its 25-cent ask and exiting at its 15-cent bid burns a tenth of the contract's maximum payout in spread alone, before Kalshi's fees take their cut on top. And prices here are probabilities, not opinions; if the mechanics of reading a 43-cent contract as a 43% chance are new to you, start with how prediction markets work and how Kalshi's odds translate before putting money on a geopolitical deadline.
Tariff markets are also a reminder of why we track this category at all: macro contracts like these move the same way the recession odds move, on news that repriced overnight while the sportsbook side of your life stayed still. If you want the sports side of the house while you watch this one settle, our free expert picks today run every slate.
Canada Tariff Odds FAQ
What time do the Canada tariffs take effect? The three Section 338 proclamations apply to covered goods entered for consumption on or after 12:01 a.m. ET on Wednesday, August 19, 2026. The Kalshi take-effect contract trades until 11:59 p.m. ET that night.
Which Canadian goods are covered by the 50% tariffs? Dairy, alcoholic beverages, and motor vehicles, roughly $20 billion in annual imports. USMCA qualification does not exempt a product, which surprised a lot of importers.
If a court later strikes down Section 338, does the market un-settle? No. The contract settles on whether the tariffs began applying on August 19, per source-agency reporting. Later litigation, including the Supreme Court case the KXTRUMPTARIFFHEAR contract tracks at 14/19, does not reopen a settled market.
What happens to my contract in a partial deal? Unclear enough that you should read the full rules. Some covered goods paying the tariff while others are carved out pushes toward Yes on our read, but edge cases are settlement-desk territory, and the review process, not the news, gets the final word.
The take-effect contract will be settled and gone by the time most pages about the August 19 deadline finish updating. The board it leaves behind, an escalation market, a court-timing market, and a Congress market, is the actual shape of a trade fight that Section 338's missing expiration date makes open-ended. The move from 60 to the low 40s was the market pricing one Wednesday. The rest of the board is pricing the year, and this page will keep tracking it as each contract resolves.
