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90 articlesThe math behind better decisions — across sportsbooks and prediction markets.
Prediction Market vs Binary Options: 6 Differences That Matter
Prediction market vs binary options compared across 6 structural dimensions: regulation, pricing, fees, payouts, and safety. Includes worked examples.
Sportsbook Hold Percentage: How to Calculate What the Book Keeps
Sportsbook hold percentage explained and calculated in 3 steps with worked examples across 6 market types. Spreads hold 4.5%, props 10-15%, parlays 20%+.
True Odds vs Implied Odds: How to Find the Real Price
True odds vs implied odds explained with 4 worked examples. Learn how to strip vig from any line and find fair probability using our free de-vig calculator.
Reverse Line Movement: When Sharp Money Overrides the Public
Reverse line movement explained with 3 worked examples. Learn why lines move opposite to public betting percentages and when RLM is a real signal vs noise.
Sharp Betting: The Math-Based System That Separates Winners From Losers
Sharp betting uses 4 quantitative steps, not gut feeling. Learn the de-vig to CLV pipeline, how books identify sharps, and why most self-declared sharps lose.
Bankroll Management: 6 Rules That Keep You Solvent
Bankroll management separates surviving bettors from broke ones. 6 rules, 4 worked examples, and the risk-of-ruin math that explains why most bettors go bust.
DraftKings Player Prediction Markets: How to Evaluate Player Event Contracts
DraftKings player prediction markets let you trade 3 types of player event contracts. Learn how they differ from props, fee math, and how to find +EV.
Value Betting: How to Find +EV Bets Before the Line Moves
Value betting explained with 4 methods to find true probability. Learn why value and EV are the same concept, plus how CLV confirms your edge is real.
How to Hedge Your Bets: The Math Behind Locking In Profit
Hedge your bets using 3 formulas and worked examples. Learn when hedging locks in profit, when it destroys EV, and the partial hedge sweet spot.
Arbitrage Betting: How to Find and Calculate Risk-Free Profits
Arbitrage betting explained with 4 worked examples and the exact formulas. Learn how to find arbs, size stakes, and avoid the 3 traps that erase profit margins.
Is Polymarket Legal in the US? Access, Rules, and Alternatives
Is Polymarket legal in US? 3 regulatory layers determine your access. USDC settlement, state rules, and CFTC-regulated alternatives explained with math.
Kalshi Fees Explained (2026): Every Cost Before You Trade
Kalshi fees broken down with 4 worked examples. Maker vs taker costs, how price level changes your fee, and when fees wipe out your edge.
Prediction Market Fed Rate Cut: How to Trade Economic Data Contracts
Prediction market Fed rate cut contracts explained with 4 trading strategies for CPI, jobs report, and rate decisions. Includes 3 worked P&L examples.
Prediction Market Election Forecast: How to Read and Trade 2026 Midterms
Prediction market election forecasts outperformed polls in 5 of 6 cycles. 4 strategies for trading 2026 midterm markets on Kalshi and Polymarket.
CFTC Prediction Market Rules 2026: The Regulatory Framework Explained
CFTC prediction market rules in 2026 cover 4 regulated platforms, Section 1256 tax treatment, and 2 pending bills. The complete regulatory guide for traders.
Prediction Market Liquidity: How Depth, Spread, and Slippage Affect Every Trade
Prediction market liquidity in 3 dimensions: depth, spread, and slippage. Includes 2 worked examples showing how a $1,000 order costs $8 vs $47 across markets.
Webull Prediction Markets: How the $0 Commission Model Actually Works
Webull prediction markets route through Kalshi with $0 commission. 3 fee comparisons show what you actually pay vs Robinhood, Kalshi, and DraftKings.
Fanatics Markets: What Sports Fans Need to Know Before Trading
Fanatics Markets charges ~$0.02 per contract in 24 states via Crypto.com infrastructure. 4 worked examples show when the fees justify the convenience.
Prediction Market Drawdown: Why Losing 50% Doesn't Mean You're Wrong
Prediction market drawdown math explained with 6 worked examples. See the expected drawdowns at every Kelly fraction and the recovery math most traders ignore.
Outcome Trading: The Unified Framework for Sportsbooks and Prediction Markets
Outcome trading unifies sportsbooks and prediction markets under 1 framework. 5 shared formulas, platform-specific edges, and the math that bridges both.
Event Risk Hedging: Using Prediction Markets to Protect Real-World Exposure
Event risk hedging with prediction markets in 4 strategies. Covers election, economic, and weather hedging with 5 worked examples and exact dollar math.
Prediction Market Portfolio Allocation: How to Build a Real Portfolio
Prediction market portfolio allocation across 5 positions with correlation math. 3 worked examples covering Kelly sizing, exposure caps, and rebalancing.
Prediction Market Cost Basis: How to Calculate It for Every Trade
Prediction market cost basis includes purchase price + fees across 3 lot methods. Worked examples for FIFO, specific ID, and multi-lot positions on Kalshi and Polymarket.
Prediction Market Returns: What Realistic ROI Actually Looks Like
Prediction market returns depend on 3 variables most traders ignore. See worked examples showing how a 3% edge compounds at different turnover rates.
Prediction Market Win Rate: Why It Misleads and What to Track Instead
Prediction market win rate is the wrong metric for 91% of traders. 4 worked examples show why a 40% win rate prints money and 70% loses it.
Gambling Loss Deduction Changes 2026: The 90% Cap That Creates Phantom Income
Gambling loss deduction changes in 2026 cap deductions at 90% of losses. 4 worked examples show the tax hit and how to avoid it.
Robinhood Prediction Market 1099: How to Read and File It
Robinhood prediction market 1099 reporting explained in 5 steps. Section 1256 treatment, cost basis checks, and a worked example of a full year of trades.
DraftKings Predictions Taxes: 1099-B Reporting and the 60/40 Split
DraftKings Predictions taxes use 1099-B reporting with Section 1256's 60/40 split. Worked example on $5K in profits saves $510 vs ordinary rates.
Prediction Market Market Making: How the Bid-Ask Spread Pays You
Prediction market market making explained in 4 components: spread capture, inventory risk, fee math, and 3 worked P&L examples for CLOB platforms.
Sports Betting ROI: How to Calculate and Track Your Real Return
Sports betting ROI measures profit per dollar wagered. Learn the formula, 3 worked examples, realistic benchmarks (2-5%), and why ROI without turnover is meaningless.
How Sportsbooks Make Money: The Math Behind Every Dollar They Keep
How sportsbooks make money on 6 revenue streams, from 4.5% vig on spreads to 30%+ on SGPs. Worked examples show book revenue on $1M in total handle.
Sportsbook vs Prediction Market Arbitrage: How to Find and Execute Cross-Platform Arbs
Sportsbook vs prediction market arbitrage delivers 4-8% risk-free returns. 3 worked examples with de-vig math, fee-adjusted calculations, and 4 execution rules.
De-Vig Calculator: How to Strip the Margin From Any Betting Line
De-vig calculator removes sportsbook margin in 3 steps. 7 methods compared with worked examples, plus when each one gives you the most accurate true odds.
Line Movement: How to Read, Interpret, and Profit From Shifting Odds
Line movement explained with 4 worked examples showing how odds shifts change the math. Learn to read sharp money, steam moves, and closing line value signals.
Implied Probability Calculator: 3 Formulas to Convert Any Odds Format
Convert American, decimal, and fractional odds to implied probability with 3 simple formulas. Works for any betting market or sportsbook.
True Probability Calculator: How to Strip the Vig and Find Real Odds
True probability calculator removes sportsbook vig in 3 steps. 7 de-vig methods, worked examples, and when each method matters most.
Bankroll Calculator: How to Set Your Starting Bankroll and Unit Size
Bankroll calculator guide with 3 methods for setting your starting bankroll. Includes risk tolerance math, unit sizing formulas, and 4 worked examples.
Sports Betting ROI Calculator: How to Track Your Real Return
3 ROI formulas separate profitable bettors from break-even ones. Learn to calculate, track, and improve your sports betting return on investment.
How to Trade on Robinhood Prediction Markets: A Step-by-Step Guide
How to trade prediction markets on Robinhood in 5 steps, with fee math, order types, and 2 worked examples showing real contract costs.
Betting Edge Calculator: How to Find and Measure Your Real Edge
Betting edge calculator guide with 3 methods to measure your real edge. Learn how to separate skill from luck using sample size, CLV, and closing line analysis.
Polymarket Fees Explained: Per-Category Taker Fees (2026)
Polymarket charges per-category taker fees on the same curve as Kalshi, from zero (geopolitics) to 0.07 (crypto). Makers pay zero. Full fee table, formula breakdown, and worked examples for every category.
Half Point Calculator: When Buying Points Is Worth the Price
Half point calculator shows when buying points has +EV. 5 key numbers, worked math, and the 3-to-7 rule that separates sharp line moves from sucker bets.
Round Robin Calculator: When Parlays in Disguise Pay Better
Round robin calculator breaks 4+ legs into every parlay combo. 3 formulas show when round robins beat straight parlays by reducing variance.
Teaser Calculator: When Buying Points Actually Has +EV
Teaser calculator math reveals when buying points is +EV. 3 formulas, break-even analysis, and the 3/7 rule that separates sharp teasers from sucker bets.
Middle Bet Explained: How to Win Both Sides of a Wager
Middle bets profit when the result lands between 2 lines. 3 worked examples with exact math, expected value formulas, and when middling is worth the risk.
Odds Boost Calculator: How to Find the True EV of Any Profit Boost
Odds boost calculator math: 3 methods to calculate the real EV of boosted odds. Most promos are worth $2-15. Some are worth $50+.
Free Bet Calculator: How to Convert Free Bets Into Guaranteed Profit
Free bet calculator math for converting bonus bets at 70-80% rates. Learn the SNR conversion formula, 2 worked examples, and 5 mistakes that destroy your edge.
Prediction Market Fees Comparison: 8 Platforms Ranked by What You Actually Pay
Compare prediction market fees across all 8 platforms with worked examples showing the real cost per $100 trade. Find the lowest-fee platform for your strategy.
Live Arbitrage Betting: 4 In-Play Strategies That Lock in Profit
Live arbitrage betting explained with 4 strategies and real numbers. In-play odds move fast enough to create 2-5% guaranteed profit windows.
Prediction Market Live Trading: 4 Real-Time Strategies That Work
Prediction market live trading in 4 strategies: news scalping, spread capture, momentum exits, and hedging. Includes 3 worked examples with fee math.
Prediction Market Taxes 2026: IRS Rules for Kalshi, Polymarket & Robinhood
How are prediction markets taxed in 2026? 3 IRS classifications, Section 1256 vs capital gains vs gambling, 1099 reporting by platform, and the new 90% loss deduction cap.
Prediction Markets vs Polls: Which Forecasts the Future Better?
Prediction markets vs polls compared across 6 elections, 2 accuracy metrics, and the math that explains why markets beat surveys 71% of the time.
Cross-Platform Arbitrage: Sportsbook vs Prediction Market
Cross-platform arbitrage locks in 5-10% risk-free returns when sportsbooks and prediction markets disagree on price. 3 worked examples with fee-adjusted math.
Prediction Market No-Vig Advantage: Why Explicit Fees Beat Hidden Margins
Prediction market fees cost 40-60% less than sportsbook vig at most price points. 4 worked examples show exactly where the savings hide.
Prediction Market Mistakes: 8 Errors That Destroy Your Edge
Prediction market mistakes cost beginners 15-40% of expected value. Learn 8 common errors with worked examples and the math to fix each one.
Best Prediction Market in 2026: 8 Platforms Compared by the Numbers
8 prediction market platforms compared on fees, liquidity, and access. Find which platform costs less for your specific trading style in 2026.
Cross-Platform Edge: 4 Strategies That Exploit Pricing Gaps
Cross-platform edge strategies deliver 3-10% returns by exploiting pricing gaps between sportsbooks and prediction markets. 4 methods with worked math.
Novig Prediction Market: $75M Raise Values Sports Exchange at $500M
Novig raised $75M at a $500M valuation from Pantera Capital. 3 things traders need to know about the P2P sports prediction market seeking CFTC approval.
Are Prediction Markets Gambling? The Math Says It Depends on You
Are prediction markets gambling? 91% of traders lose money, but so do 80% of options traders. The 3 structural tests that separate gambling from trading.
What Does Over/Under Mean? The Math Behind Totals Betting
What does over under mean in betting? Learn how totals work with 3 worked examples, vig math, and the half-point hook that costs bettors 4.5% edge.
Point Spread Explained: How to Read, Calculate, and Beat the Number
Point spread explained with 4 worked examples and the math behind every spread bet. Learn how spreads set prices and where the edge hides.
Event Contract vs Options: 7 Differences That Change the Math
Event contract vs options compared across 7 dimensions: pricing, risk, fees, Greeks, and more. Includes worked examples with break-even math for both instruments.
FanDuel Prediction Markets: 4 Reasons the 50-State Access Changes the Math
FanDuel prediction markets work in all 50 states. 4 worked examples show when the convenience justifies the cost and when cheaper platforms win.
DraftKings Prediction Markets: 5 Fee Traps and How to Avoid Them
DraftKings prediction markets charge $0.04 per round-trip. 5 worked examples show when the fees make sense and when they destroy your edge.
Coinbase Prediction Market Fees: What You Actually Pay Per Trade
Coinbase prediction market fees start at $0.02 per contract but can eat 10% of thin margins. 3 worked examples show the real cost of trading through Coinbase.
Prediction Market Position Sizing: How to Size Every Contract
Prediction market position sizing determines 80% of your P&L. Learn fee-adjusted Kelly, correlation discounts, and liquidity limits with 5 worked examples.
Event Contract Tax Treatment: 3 Classifications
Event contract tax treatment varies across 3 IRS classifications. Learn how Section 1256, capital gains, and gambling rules affect your prediction market taxes.
How Does Moneyline Work? The Math Behind Every Straight Bet
How does moneyline work? 5 worked examples break down the math behind plus and minus odds, implied probability, and finding value in straight bets.
Prediction Market Bankroll Management: How to Size Positions and Survive
Prediction market bankroll management requires different math than sports betting. 5 worked examples cover Kelly sizing, capital lockup, and why 91% of traders lose.
How to Trade on Robinhood Prediction Markets: Step-by-Step Guide (2026)
How to trade prediction markets on Robinhood — step-by-step setup, fee breakdown, tax treatment, and how to evaluate event contracts before your first trade.
How to Read Odds: 3 Formats, 1 Skill That Changes Everything
How to read odds in 3 formats with 7 worked examples. American, decimal, and fractional odds explained so you never misread a line again.
How to Trade Event Contracts: A Step-by-Step Guide
How to trade event contracts in 5 steps: buy, sell, and calculate profit on binary contracts priced 0-100 cents. Includes 3 worked examples with fee math.
Odds Converter: How to Convert Between American, Decimal & Fractional Odds
Free odds converter with formulas to convert between American, decimal, fractional odds, and implied probability. 6 worked examples, a reference table, and an instant converter tool.
Kalshi 1099: Tax Reporting for Event Contracts
Kalshi 1099-B tax reporting explained with 60/40 Section 1256 treatment, 2 worked examples, and 2026 deadlines for event contract traders.
Correlated Positions: How Linked Bets Amplify Risk
Correlated positions can triple your actual risk exposure. Learn the 4-step portfolio audit process with worked examples and position sizing adjustments.
Multi-Outcome Markets: Finding Mispriced Contracts
Multi-outcome markets misprice 5-15% of contracts due to overround and longshot bias. Learn 3 de-vig methods to identify and exploit these inefficiencies.
Polymarket Tax Reporting: What Traders Owe
Polymarket tax reporting requires self-tracking every trade. Learn the 3 possible tax classifications, how to calculate gains, and what records to keep.
Prediction Market Strategy: 5 Quantitative Edges
Prediction market strategy built on 5 quantitative methods. EV-based contract selection, fee-adjusted sizing across 8 platforms, and 2 worked trade evaluations.
Prediction Market vs Sportsbook: 6 Key Differences
Prediction market vs sportsbook comparison across 6 dimensions: fees, odds, liquidity, markets, exits, and edge. Includes worked cost examples for each.
How Prediction Markets Work: A Complete Guide
How prediction markets work in 6 steps: pricing, trading, fees, platforms, and finding edge. Includes 4 worked examples with real contract math.
Polymarket Substack Partnership: Live Odds Meet Independent Media
Polymarket's exclusive Substack partnership lets 3M+ authors embed live prediction market data. What the deal means for liquidity, pricing, and traders.
Prediction Market Fees Explained: The Real Cost of Every Trade
Prediction market fees reduce your edge by 30-60% on typical trades. Compare Kalshi and Polymarket fee structures with 5 worked examples and break-even math.
Odds Formats Explained: American, Decimal, Fractional
Odds formats explained with 3 conversion formulas and worked examples. Learn how American, Decimal, and Fractional odds hide or reveal the true price.
Bankroll Turnover: Why Bet Volume Beats a Big Edge
Bankroll turnover multiplies small edges into real profit. See the 3-step compounding formula, worked examples, and why 200 bets at 1% edge beat 5 bets at 10%.
Closing Line Value Explained: The True Measure of Betting Skill
Closing line value explained in 4 steps with worked examples. CLV is the single best predictor of long-term profit, and most bettors ignore it entirely.
Kelly Criterion Explained: Optimal Bet Sizing
Kelly criterion explained with 4 worked examples. Learn the Kelly formula, why half Kelly beats full Kelly in practice, and how to size every +EV bet.
Parlay Math: How Compounding Vig Destroys Your Edge
Parlay math broken down with 5 worked examples. A 3-leg parlay at standard juice carries 15% vig, not 4.5%. Here is exactly how the compounding works.
Sports Betting Math: Every Formula You Actually Need
5 core formulas separate winning bettors from losing ones. Learn EV, vig, Kelly sizing, CLV, and bankroll turnover with worked examples.
What Is Vig in Betting? How to Calculate Vigorish & Find True Odds
What is vig in betting? Learn how to calculate vig with 3 methods, see how hold varies across 4 market types, and strip it from any line with our free de-vig calculator.
How to Calculate Expected Value (EV) in Betting: Formula, Examples & Free Calculator
How to calculate expected value in sports betting. The EV formula explained with 3 worked examples, a free EV calculator, and the complete pipeline from vig removal to bet sizing.