Every March, 68 teams, 67 games, and billions of dollars in wagers collide in the most chaotic three weeks in American sports. For casual fans, the Tournament is pure entertainment. For serious bettors, the Tournament is the most exciting three-week period of wagering. What many bettors don’t realize is that the platform you choose to bet through matters.

This article breaks down how traditional sportsbooks and prediction exchanges work, what separates them structurally, and how those differences play out in real odds across four 2026 East Region first-round matchups. The data is sourced from live DraftKings and Novig markets. 

How a Sportsbook Works

When you place a bet at a traditional sportsbook like DraftKings or FanDuel, you are betting against the sportsbook itself, not against another participant. The sportsbook employs oddsmakers who set lines based on statistical models, injury reports, and historical trends. Those lines are designed to attract balanced action on both sides of a market while preserving a profit margin for the operator regardless of the outcome. That built-in margin is called the vig, or juice.

Here is how it works in practice. On a standard -110 spread bet, you wager $110 to win $100. A bettor on the other side also wagers $110 to win $100. The sportsbook collects $220 total and pays out $210 to the winner, keeping the remaining $10 (roughly 4.5% of total action) as revenue.

A -110 line implies a 52.4% break-even rate. That means a bettor needs to win more than half of all wagers just to avoid losing money, before accounting for any edge in picking games. Over a full March Madness slate of 30 to 50 trades, that fee compounds meaningfully.

One additional feature of the sportsbook model worth understanding is that many operators limit or restrict accounts that show consistent winning patterns. Since sportsbooks are the counterparty on every bet, a profitable bettor represents a direct cost to the business. Risk management is a standard part of how major sportsbooks operate.

‍How a Prediction Exchange Works

A prediction exchange operates differently. Rather than trading against an operator, users trade directly against other participants in a peer-to-peer market. The platform facilitates the trade but does not take the other side of any bet.

On a prediction exchange like Novig, prices are set by supply and demand. When more money flows toward one outcome, the price adjusts to reflect that market activity. There is no house oddsmaker building a margin into the line. The odds are a product of what buyers and sellers in the market are willing to accept.

This structural difference has a few practical consequences worth understanding before looking at the numbers. 

• Odds are closer to true probability. Without a house margin embedded in every line, prices on a prediction exchange tend to reflect market consensus more directly. A -110 line at a sportsbook implies a 52.4% probability but only pays as if the event has a 47.6% chance of happening. Exchange pricing eliminates that gap.
• Traders can propose their own lines. With a sportsbook, users have to take whatever lines they see show up in the app. On exchanges like Novig, users can propose their own lines and wait for other traders to take the opposite side. This is helpful when you have a very specific idea of the trade you want.
• Winning accounts are not penalized. Since an exchange earns through platform structure rather than trader losses, a consistently profitable trader is not a business risk. Novig does not limit accounts for winning.

The Cost of Vig Across a Tournament

To put the vig into perspective, at -110 pricing across 40 trades at $100 each, a bettor pays roughly $180 in expected fees before winning or losing a single game. That is money going to the operator regardless of how well the picks perform.

On a no-vig exchange, that figure drops to zero. Every dollar wagered is working directly on the outcome rather than subsidizing a platform margin. For traders who play a significant volume across March Madness, that gap is worth paying attention to.

Odds and Vigs Compared Across March Madness Matchups

Below are spreads, totals, and moneylines, pulled from DraftKings and Novig at 11 AM on March 16th, across four 2026 East Region first-round matchups. 

1. Duke (1) vs. Siena (16)

Duke finished the regular season 32-2 with the largest adjusted efficiency margin in the country at 38.9 points, led by Cameron Boozer, the frontrunner for National Player of the Year. Siena is making its first Tournament appearance since 2010 after winning the MAAC and ranks outside the top 300 nationally in offensive efficiency. The Blue Devils are the prohibitive favorite, with most analysts projecting a margin of 25 or more points. 

Since the game outcome is so certain, the spread and total are where most of the meaningful trading interest sits. The moneyline on Duke is effectively untradeable at standard sportsbook prices given the extreme implied probability, which is where exchange and sportsbook pricing diverge most dramatically. This is a good example of a game where the platform you choose matters less for moneylines and more for spreads. 

Key takeaway: Novig improves pricing on the Siena spread and the over, with both moving from juice-paying to profit-paying positions. The Duke moneyline difference is the largest structural gap in this matchup.

What a $100 bet looks like on the Siena spread:

• DraftKings: Siena +29.5 at -110: $100 bet returns $190.91 total
• Novig: Siena +29.5 at +100: $100 bet returns $200 total

That is $9.09 more in upside on Novig for the exact same bet.

2. TCU (9) vs. Ohio State (8)

Ohio State (21-12) returns to the Tournament for the first time since 2022, led by senior guard Bruce Thornton, the program’s all-time leading scorer at 20.2 points per game. TCU (22-11) earned its bid by winning eight of its last nine regular-season games and finished 11-7 in the Big 12, with wins over Iowa State and Texas Tech. Sophomore forward David Punch averages 14-plus points and nearly seven rebounds for the Horned Frogs. Expert opinion is split on this matchup. 

This game is priced as a genuine toss-up, with a spread of 2.5 points and a total that reflects two defense-oriented teams. In a game this close, even small pricing differences carry more weight than they would in a blowout. The spread is where the exchange pricing advantage is clearest, while the total and Ohio State moneyline favor DraftKings. This is a matchup where it is worth checking both platforms by market type before placing.

Key takeaway: Novig improves pricing on both sides of the spread. The total and Ohio State moneyline are better on DraftKings. The TCU moneyline is identical across both platforms. 

What a $100 bet looks like on the TCU spread:

• DraftKings: TCU +2.5 at -110: $100 bet returns $190.91 total
• Novig: TCU +2.5 at -102: $100 bet returns $198.04 total

That is $7.13 more in upside on Novig.

3. Northern Iowa (12) vs. St. John’s (5)

St. John’s (27-7) is one of the more debated seeds in the field. The Red Storm won both the Big East regular season and Tournament titles under Rick Pitino and carry a borderline top-10 defense nationally. Multiple analysts have argued they were underseeded. Northern Iowa (23-12) plays the slowest tempo in the entire Tournament at 62.4 possessions per game and has a top-25 defense, making them a credible opponent for any team that struggles to create in half-court settings. Most projections have St. John’s advancing, with the margin question centered on whether Northern Iowa can slow the game enough to keep it close.

This game is expected to be one of the lower-scoring matchups in the first round, driven by Northern Iowa’s pace and both teams’ defensive identities. Since St. John is a significant but not overwhelming favorite, the moneyline is where the clearest pricing comparison emerges. This matchup also provides the clearest depiction of how exchange pricing can benefit both sides of the same market simultaneously. 

Key takeaway: Novig carries the better price on both sides of the moneyline in the same game at the same time. That outcome is structurally difficult at a traditional sportsbook, where an operator margin is built into both sides. The St. John’s spread is also 11 cents cheaper on Novig.

What a $100 bet looks like on the Northern Iowa moneyline:

• DraftKings: Northern Iowa +440: $100 bet returns $540 total
• Novig: Northern Iowa +449: $100 bet returns $549

That is $9 more in upside on Novig if the upset hits. 

4. Kansas (4) vs. Cal Baptist (13)

Kansas (23-10) enters with a top-10 defense and projected lottery pick Darryn Peterson averaging 19.9 points per game. The concern heading into the Tournament is the Jayhawks’ Big 12 Tournament performance, where they scored just 47 points in a loss to Houston, the lowest total of their season by a significant margin. Cal Baptist (25-8) is making its first-ever NCAA Tournament appearance after winning the WAC title. The Lancers are physical and defensively oriented, but the talent gap is real and first-time Tournament programs rarely pull first-round upsets against established programs. Most analysts expect Kansas to advance comfortably.

This game carries a significant spread, which means the over on the total and the underdog moneyline are where most of the trading interest concentrates for bettors looking for value. The pricing gap between platforms is largest on the total over and the Kansas moneyline, making this a good matchup to compare platforms carefully before placing. 

Key takeaway: Novig carries the better price on both sides of the moneyline and on the total over, which shows the widest single-market pricing gap in this entire matchup at 20 cents. 

What a $100 bet looks like on the Cal Baptist moneyline:

• DraftKings: Cal Baptist +750: $100 bet returns $850 total
• Novig: Cal Baptist +777: $100 bet returns $877 total

That is $27 more in upside on Novig if the upset hits. 

‍What the Odds Show

Across these matchups, a consistent pattern emerges. Novig offers more competitive pricing on spreads and underdog moneylines in the majority of markets. In several cases, the exchange prices both sides of the same market more favorably than DraftKings at the same time, something a traditional sportsbook cannot do by design because operator margin is built into both sides of every line. 

The pricing gaps are not dramatic on any single bet, but they are consistent. A few dollars of additional return on an underdog moneyline, a cent or two saved on a spread, a total that pays a small profit rather than charging juice. Across a full Tournament slate of trades, those differences accumulate into a meaningful gap between what a user returns on an exchange versus a sportsbook. 

The matchups above span different game types and largely different seedings. The pricing advantage on Novig shows up across all of them.

Why Novig Is America’s #1 Sports Prediction Market

Novig is America’s #1 Sports Prediction Market. The data across these four matchups reflects that in practice, but it is worth explaining what sits behind those numbers.

• No vig, no house. Novig operates as a commission-free, peer-to-peer exchange. There is no built-in margin on any market. The prices you see reflect what other traders are willing to accept, not what an operator needs to protect a book. That is why spread and underdog moneyline pricing is consistently tighter on Novig than on DraftKings.
• You will never be limited for winning. On Novig, a profitable track record is an asset rather than a liability. Novig’s revenue does not come from bettor losses, which means winning traders are welcomed rather than flagged. If you do the research and the picks land, your access to markets stays the same.
• Better odds. Novig users are more likely to be profitable in the long run compared to bettors on traditional sportsbooks. This is due to the natural supply and demand dynamics of the exchange.
• Available in 36 states and Washington, DC. Novig is accessible on iOS, Android, and web, with no residency requirement. If you are 21 or older and physically located in an eligible state, you can trade.

March Madness is 67 games across three weeks. That is 67 chances for the pricing difference to show up in your results. The data in this article shows what that looks like on seven games from a single region. Across a full bracket, it compounds. 

Quick Summary

The pricing across these four East Region matchups shows consistent pricing advantages for Novig on spreads, underdog moneylines, and most totals. The structural difference is that prediction exchanges operate without a house margin built into every market, which means pricing can be more efficient on both sides of a trade and winning accounts face no restrictions.

For traders who are serious about March Madness, that combination of better pricing and no account limitations is worth paying attention to before the first tip-off.