When a Spread Expires Between the Strikes
When a spread expires between the strikes, the short leg is exercised and the long leg dies worthless. How often that happens on SPY, and the fix by 4 p.m.
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Why Are Spreads Wider at the Open? Real Data
Why are spreads wider at the open? Tick-level quotes price the opening premium half hour by half hour, show how fast it fades, and what premarket really costs.
What It Costs to Trade a Stock, Measured
Commissions are zero, but every stock trade pays the bid-ask spread. See the real cost of trading stocks, measured in basis points across 12 household names.
Sector Scorecard H1 2026: Winners and Losers
All eleven S&P 500 sector ETFs ranked for H1 2026: the winners and losers, the Q1-to-Q2 rotation, breadth inside each sector, and what each costs to trade.
What Is a Bid-Ask Spread? Real Costs
Learn what a bid-ask spread is, how to calculate it, and what it costs per trade, with real spreads measured from tick-level quote data on US stocks.