Prediction Markets in South Dakota: A Federal End-Run Around a Deadwood-Only Law

Yes, and current to August 2, 2026, prediction markets operated by CFTC-registered exchanges are available to South Dakota residents, and the state has taken no enforcement action to stop them. South Dakota is not one of the nine states the federal Commodity Futures Trading Commission has sued, and its regulators have not sent cease-and-desist letters, filed suit, or moved to fine any operator. Adults in the state can open accounts on Kalshi, FanDuel Predicts, DraftKings Predictions, Robinhood and other venues and trade event contracts, including contracts tied to sporting events.

The reason sits in a jurisdictional seam. These platforms register with the CFTC as designated contract markets and list what they call event contracts — financial instruments that settle at a dollar if an outcome happens and nothing if it does not. Their legal theory is that these are federally regulated derivatives, governed by the Commodity Exchange Act, which places contract-market oversight in federal hands and leaves no room for a state gaming board to license or ban them. South Dakota’s gambling authority, by contrast, is built entirely around a specific place — Deadwood — and specific activities the constitution enumerates. When a product claims to be a federal financial instrument rather than a bet, it slides past a framework that was never written to reach it.

Whether that theory holds is being fought out in courtrooms across the country, and the outcome is far from settled. But South Dakota has chosen not to be one of the states testing it. That posture of watchful non-interference — concerned enough to sign a warning letter, unwilling to litigate — is what makes the state available today and worth understanding in detail below.

To see clearly why a federal exchange looks so attractive to a South Dakotan, you have to understand how narrow the state’s own offering is. Sports wagering here traces to a 2020 ballot measure, Constitutional Amendment B, which South Dakota voters approved to authorize wagering on sporting events within the city limits of Deadwood. It amended Article III, Section 25 of the South Dakota Constitution — the same clause that first let Deadwood run limited card games and slot machines in 1989 as a way to fund historic preservation of the town. The legislature then wrote the operating rules into the Deadwood gaming chapter of state law, codified at SDCL chapter 42-7B, and handed enforcement to the South Dakota Commission on Gaming.

What that produced is retail betting in the strictest sense. Commission rules require every wager to be placed from inside a licensed gaming establishment within Deadwood — operators must install equipment that confirms the bet originates within those city limits. You walk to a counter or a self-serve kiosk at a property like Deadwood Mountain Grand or the Gold Dust, and you bet there. Tribal casinos across the state, such as Dakota Sioux near Watertown and Dakota Connection near Sisseton, offer sports wagering as well under their federal gaming compacts, but those too are on-property, in-person operations. There is no legal way, under current South Dakota law, to place a mobile sports bet from your home.

The market that results is tiny. Deadwood’s monthly sports handle has peaked around 1.6 million dollars during a March Madness surge — a figure that many single mid-size sportsbooks in neighboring states clear before noon. The college restrictions tighten it further: South Dakota bars wagering on games involving in-state college teams, including the South Dakota State Jackrabbits and the University of South Dakota Coyotes, and prohibits player prop bets on college athletes entirely. For a resident who wants menu depth and the convenience of a phone, the retail-only system leaves an obvious gap. Federally regulated prediction markets have stepped into it.

Few facts capture the irony better than this one. On December 22, 2025, FanDuel and CME Group launched FanDuel Predicts, and they chose just five states for the debut: Alabama, Alaska, South Carolina, North Dakota and South Dakota. A state that constitutionally refuses to let its residents bet on sports from a phone was hand-picked as one of the very first places in America to receive a mobile event-contract product from the country’s largest sports betting brand.

The selection was not random. FanDuel designed Predicts to be compliance-first: it lists sports event contracts specifically in states where FanDuel does not operate a licensed mobile sportsbook, and it is built to be withdrawn from a state if that state legalizes online sports betting. South Dakota, with its Deadwood-only law and no FanDuel app, fit the profile precisely. The same logic that keeps FanDuel’s sportsbook out of South Dakota is what qualified the state for its prediction product. If SJR 504 passes in November and mobile sports betting arrives, FanDuel’s own framework suggests the sports side of Predicts could eventually be pulled here — a moving target worth watching.

FanDuel Predicts also matters because it is the most consumer-protective structure in the sector, which is unusual for a product that sits outside state gambling safeguards. More on that below.

Nine states have taken the CFTC to court or drawn the agency’s own lawsuits by trying to block these platforms — Arizona, Connecticut, Illinois, New York, New Mexico, Minnesota, Rhode Island, Wisconsin and Kentucky. South Dakota is on none of those lists. No cease-and-desist letter from the Commission on Gaming has surfaced. No suit has been filed in state or federal court naming a prediction-market operator as a defendant in South Dakota. As of August 2, 2026, the state’s regulatory response has been passive.

That does not mean silence. South Dakota Attorney General Marty Jackley was among the more than 40 state attorneys general who signed a joint comment letter to the CFTC arguing that sports event contracts are simply sports betting dressed up as derivatives and that states retain the right to regulate gaming within their borders. The American Gaming Association has hammered the same theme, with a guest column circulated in South Dakota media arguing that prediction markets are siphoning revenue away from state and tribal economies, South Dakota’s included. So the political concern is real and on the record. What is absent is action — no bill to ban the platforms, no enforcement order, no litigation.

Part of the explanation is structural. South Dakota’s tribal gaming operations have a direct interest, and tribal gaming across the country has framed the prediction-market fight as a threat to compact exclusivity. But a compact-exclusivity claim is a matter of federal Indian gaming law, not something a state attorney general resolves through a gambling statute, and South Dakota’s tribes have not been the ones leading courtroom challenges the way California and New Mexico tribes have. The result is a state that watches, comments, and lets the exchanges operate.

South Dakota’s hands-off stance only lasts as long as the underlying legal question stays unresolved, and that question is being litigated hard in other jurisdictions. The core dispute is simple to state: is a sports event contract a federally regulated financial instrument, or is it a bet that a state gets to license and tax? If it is the former, federal law crowds out state gambling codes and South Dakota’s Deadwood boundary becomes irrelevant to these products. If it is the latter, every unlicensed operator in the state is exposed.

The courts have split, which is why nothing is final. The rulings so far pull in opposite directions:

For South Dakota the practical takeaway is that its own inaction is a bet on the federal outcome. If the Supreme Court ultimately rules that these are federally protected instruments, the state will have avoided a losing fight. If the Court rules that they are gambling, South Dakota will still have to decide whether to act — and by then the Deadwood-only status quo may already have been overtaken by the November 2026 mobile-betting vote.

The mechanics differ enough from a sportsbook that they are worth spelling out for a South Dakota reader who has only ever bet at a Deadwood counter. On a prediction market you are not laying odds against the house. You are buying and selling contracts against other users, with the exchange matching orders the way a stock exchange matches buyers and sellers. Each contract is a yes-or-no claim — will a given team win, will a specific economic number land above a threshold, will a candidate carry a state — and it is priced somewhere between one cent and 99 cents.

That price is the market’s live estimate of probability. A contract trading at 62 cents reflects a crowd judgment of roughly a 62 percent chance the event happens. If you buy it and the event occurs, the contract settles at a dollar and you keep the 38-cent difference; if it does not, the contract is worth nothing and you lose your stake. Because you can sell before settlement, you can also lock in a gain or cut a loss mid-event, which a fixed Deadwood ticket does not let you do. The exchange earns from trading fees rather than from a built-in vig, at least in principle, though effective costs vary by platform. For a resident used to walking up to a window for a static line, the shift is from betting against a bookmaker to trading a probability against the wider market.

The menu is broad and, unlike the Deadwood sportsbook, it reaches well past sports. Depending on the platform, a South Dakota account can hold contracts across several categories:

South Dakota imposes no state-specific restriction on these categories, because the state has not asserted authority over the platforms at all. The limits that exist are the platforms’ own compliance choices and the CFTC’s evolving rules — a June 2026 federal proposal, for instance, would bar contracts on things like individual player injuries, referee decisions and certain catastrophic events, regardless of state.

Beyond those three, South Dakota residents can also reach a wider field of CFTC-registered venues and distributors, each with its own market focus and fee model. Availability of any single platform can change, so confirm on the operator’s own site before funding an account.

The full roster of reviewed venues lives on our prediction markets hub. Availability of any single platform can change, so confirm on the operator’s own site before funding an account.

For a South Dakota resident the choice between these two is unusually stark, because one requires a road trip and the other does not. A legal sports bet in this state means physically visiting a Deadwood casino or a tribal property; a prediction-market trade happens on your phone from anywhere in South Dakota. That single difference — mobility — is why the exchanges have found an audience here that a state with statewide mobile betting might never have handed them.

The contrast runs deeper than convenience. A Deadwood sportsbook is licensed, taxed and supervised by the South Dakota Commission on Gaming; if a dispute arises, there is a state regulator to hear it, a state self-exclusion option, and state-mandated responsible-gambling tools. A prediction market is licensed by a federal financial regulator and sits entirely outside that state apparatus. If your interest is specifically in sports and you want the protections of a state-regulated book, the retail Deadwood route remains the compliant path today, and our South Dakota sportsbooks guide walks through those options. For the bigger national picture of where mobile books operate, see the roundup of states with online sportsbooks and the main online sportsbooks hub.

Two practical warnings belong on any honest South Dakota page. The first is tax. Prediction-market operators generally do not issue the 1099-B forms a brokerage would, and the IRS has published no clear rule on whether event-contract gains are gambling income, ordinary income or something governed by the tax code’s futures provisions. That leaves reporting genuinely unsettled, and it varies by platform — a brokerage-distributed contract may be handled differently than one traded natively on an exchange. This is not tax advice; a South Dakota resident with meaningful gains should talk to a tax professional and keep their own records, since the platform may not do it for them. South Dakota levies no state personal income tax, which removes one layer of complexity, but the federal treatment still applies.

The second warning is about protection. When you trade on a CFTC exchange, you step outside every safeguard the state built for Deadwood gambling. Before creating an account anywhere, get familiar with the state’s legal gambling age rules and never deposit money you cannot afford to lose.

Set against its neighbors, South Dakota looks moderate. North Dakota, its launch-state twin in the FanDuel rollout, sits in a similar available-and-uncontested posture. Minnesota to the east went the opposite direction, passing an outright ban that a federal judge blocked in July 2026 before it could take effect. Nevada, the most aggressive state in the country, has pursued contempt proceedings against an exchange that refused to leave. South Dakota’s watch-and-comment stance places it firmly among the states that have let the federal question play out rather than forcing it.

The variable that could reshape everything is homegrown. Senate Joint Resolution 504 cleared the South Dakota Senate on a 23-10 vote on February 11, 2026, and would put a constitutional amendment before voters at the November 3, 2026 general election. The measure would let the legislature authorize statewide electronic sports betting — but only if the wagering is offered by a Deadwood-licensed casino and routed through servers physically located inside Deadwood, and it earmarks 90 percent of the resulting tax revenue for property-tax relief. If voters approve it, South Dakota would finally have legal mobile sports betting of its own, funneled through Deadwood operators.

That vote cuts directly against the prediction-market opening. A big part of why these exchanges gained traction in South Dakota is the absence of any legal mobile alternative. Pass SJR 504, and FanDuel’s own compliance design — which lists sports contracts only where FanDuel has no sportsbook — suggests the sports side of Predicts could be withdrawn from the state, and residents would suddenly have a licensed, state-regulated app to use instead. The other categories, politics and economics and the rest, would likely stay on the exchanges regardless, since those were never within Deadwood’s reach. Watch three things through the rest of 2026: whether SJR 504 makes the ballot and passes, how the Ninth Circuit rules in the consolidated Nevada appeal, and whether the CFTC’s proposed federal rule on which contracts survive is finalized.

For how this vertical fits into gambling law nationally, see our overview of whether online gambling is legal across the United States, the full state-by-state index, and the main South Dakota gambling sites guide for every legal option in the state beyond prediction markets. South Dakota’s story is a single contradiction carried to its logical end: a state whose constitution draws the wagering line at the Deadwood city limits has become one of the earliest and least-contested homes for mobile event-contract trading in the country. Whether that lasts depends on courtrooms in other states and a ballot measure at home — both of which could land before the year is out.

All claims current as of August 2, 2026.

• South Dakota Constitution, Article III, Section 25 (games of chance and Deadwood wagering) — sdlegislature.gov
• South Dakota Codified Laws, chapter 42-7B (Deadwood gaming and sports wagering) — sdlegislature.gov
• Senate Joint Resolution 504 (2026 statewide electronic sports betting amendment) — sdlegislature.gov
• South Dakota Commission on Gaming and gaming regulation — dor.sd.gov
• South Dakota Secretary of State, 2026 ballot measures — sdsos.gov
• U.S. Commodity Futures Trading Commission, event contracts and enforcement — cftc.gov
• FanDuel and CME Group launch announcement, December 22, 2025.