Square Books vs Sharp Books

Square Books vs Sharp Books

The sportsbook industry has two distinct types of operators: "square" books that cater to recreational bettors, and "sharp" books that accept action from professionals.

What Is a Square Book?

Square (or "soft") books are designed for casual bettors:

• Heavy promotions - Bonuses, free bets, profit boosts
• User-friendly apps - Easy to use, lots of parlays
• Lower limits - Can't bet large amounts
• Quick to limit - Winners get restricted fast
• Examples: DraftKings, FanDuel, BetMGM

How Square Books Make Money

• Take action from recreational bettors
• Offer worse odds (higher vig)
• Limit or ban winning players
• Profit from bonuses and parlays

What Is a Sharp Book?

Sharp (or "hard") books welcome professional action:

• Minimal promotions - Compete on odds, not gimmicks
• Higher limits - Accept large bets
• Slow to limit - Winners can keep betting
• Better odds - Lower vig, tighter lines
• Examples: Pinnacle, Circa, Bookmaker

How Sharp Books Make Money

• Charge lower vig but higher volume
• Use sharp action to set accurate lines
• Sell their lines to other books
• Accept that some bettors will win

Why This Matters for You

For Finding Value

• Square books often have "soft" lines
• Sharp books show you the "true" market
• Compare both to find discrepancies

For Longevity

• Square books will limit you if you win
• Sharp books let winners keep playing
• Manage your accounts accordingly

For Line Shopping

• Always check sharp books first
• If they disagree with squares, investigate
• The sharp line is usually more accurate

The Market Hierarchy

Sharp Books (Pinnacle, Circa)
    ↓ Lines flow down
Regional Sharp Books
    ↓ Lines flow down
Major Square Books (DK, FD)
    ↓ Lines flow down
Smaller Square Books

When to Apply This

✓ Always compare to sharp book lines ✓ Use square book promos while you can ✓ Plan for eventual limits at square books

When to Pass

⚠️ Don't assume square = wrong ⚠️ Sharp lines aren't always "right" ⚠️ Context matters more than book type

How DMP Helps

DMP compares lines across books, helping you identify when a square book is offering value compared to the sharp market.