Prediction markets vs sportsbooks for Nuggets games: where the price comes from
A sportsbook builds its margin into both sides; a prediction market matches traders and charges a fee, or none. What that means for $100 on the Nuggets.
On any Nuggets night there are two very different kinds of venue putting a price on the same game. They get to that price from opposite directions, and the difference shows up in what a winning position pays. Colorado is one of the states where a fan can open both kinds, which makes the comparison practical rather than academic.
The sportsbook model
A sportsbook is the counterparty. It writes the line, takes the other side of every ticket and protects itself by shading both prices. A game it considers a genuine coin flip does not go up at +100 on each side; it goes up at -110 on each side. Convert those two prices to probabilities and they add to about 104.8%. The extra is the book's margin, usually called the vig or the hold, and it is in place before the opening tip.
Nobody hands you an invoice for it. It lives inside the odds. DraftKings' moneyline on tonight's game, Raptors at Nuggets, was Denver -191 and Toronto +160 as ESPN listed it at about 2:30 p.m. Eastern on Wednesday. Turned into probabilities, those two prices add up to 104.1%: a hold of about 4.1% before anyone has taken a side.
The prediction-market model
A prediction market is not a counterparty. It is a matching engine. A trader who thinks Denver wins is paired with one who thinks Denver loses, and the price is wherever their orders meet, quoted in cents as a probability. A Nuggets contract at 65 cents pays $1 if Denver wins. With no house position to protect, nobody has a reason to shade the line, and the two sides of a busy market usually add up to within a cent or two of $1.
The venues make their money in different ways:
- Novig charges no fee on pre-game straight trades placed on its app or website. Live (in-game) trades that take a resting order pay a taker fee that scales with price, and traders whose resting orders are filled pay nothing, per Novig's fee schedule as of November 2026.
- Kalshi charges a taker fee scaled by price, built on a 7% rate. It is largest on a coin flip and shrinks as one side becomes a heavy favorite.
- Polymarket US sets its own fees by market; check its schedule before trading.
The same game, three returns
Suppose the Nuggets trade at 65 cents on an exchange, close to the 65.6% DraftKings' -191 implies.
| Venue | Quote | Profit on a winning $100 |
|---|---|---|
| Prediction market, no fee (Novig pre-game) | 65¢ (about -186) | $53.85 |
| Sportsbook (DraftKings, Wednesday afternoon) | -191 | $52.36 |
| Prediction market, 7% fee rate (Kalshi) | 65¢ | $50.17 |
At the same 65-cent price, a 7% fee rate cuts the profit on a win by $3.68 per $100. The sportsbook gets its margin by moving the price instead of adding a charge. Only the no-fee trade pays the full value of the probability on the screen. The 65-cent exchange prices here are an illustration, not a quote; the board runs this calculation on live prices for every Nuggets game and sorts each side from best return to worst. How to read the Nuggets board walks through the formula.
Why this matters in Colorado
Colorado licenses sportsbooks under state law, so the DraftKings, FanDuel, BetMGM and other sportsbook rows on the board are prices a fan in Denver can actually take, at 21 and over. The books answer to the Colorado Division of Gaming, pay the state's 10% tax on their net proceeds, most of which goes to the state water plan, and since Aug. 12 have operated under a new law, SB26-131, that bans credit card deposits, caps deposits at six a day and bars texts or push alerts urging customers to bet.
Prediction markets sit outside that system. They are overseen federally by the CFTC rather than licensed state by state, and the state's sportsbook rules do not reach them. Kalshi pays no Colorado sports betting tax, Colorado Public Radio reported in May, because it says it has no gaming revenue to tax. Colorado has not ordered the exchanges out or sued them, though Attorney General Phil Weiser has joined other states in telling the CFTC that sports contracts belong under state law. Colorado sports betting in 2026 has the full picture, and the Colorado page prices this week's Nuggets games at the venues a fan in the state can open.
Novig is available in 47 states; it is not offered in Arizona, Michigan or Nevada, which matters for a fan who follows the team to Detroit on Nov. 30. What new traders get on sign-up is set out on the Novig offer page.
What "no fee" does not promise
No fee is not the same as a guaranteed better price. On a prediction market the price comes from other traders and moves with them, and a thinly traded market can show a wider gap between the best buy and the best sell than a sportsbook's built-in margin. When that happens it shows up on the board, because the hold column measures every venue's two sides the same way. A regular-season Nuggets game usually draws enough volume that the gap is small, but the board does not take that on faith; it measures it each time it refreshes.
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