Options trading research always comes back to SPY, and this episode of Market Measures explains exactly why. SPY options trading gives you the highest daily volume, the cleanest data going back over a decade, the tightest bid-ask spreads, and the lowest single-stock risk of any underlying in the market. QQQ comes in at roughly half the volume. IWM at a quarter. And single stocks like SanDisk introduce binary risk that makes any study result irrelevant to broad market conclusions. The data from 2015 to 2026 makes the case clearly, and then a live 0DTE iron condor on SPX gets pressed at the end. Helpful links: tastylive: tastylive.com FREE tasytlive Newsletters: info.tastylive.com/newsletters FREE Options Strategy Guide: tinyurl.com/bp9ms763 Follow tastylive on X (Twitter): x.com/tastyliveshow CHAPTERS: 00:00 Why SPY dominates tastylive research - the core argument 01:35 The study: SPY, QQQ, TLT, XLK, XLF, XLE compared from 2015 to 2026 02:28 Volu...