← Browse all charts Are the mega-caps doing all the work again?
Methodology: Current constituents, not point-in-time membership. History starts 2019-05-13 and can carry survivorship or constituent-change bias.
Mag 7 vs S&P 493
This is a concentration chart that shows whether leadership is broadening beyond the mega-cap winners or getting even narrower.
The deep history is for NASDUCK paid members.
This free chart covers the last five years. Everything older, plus the CSV and JSON downloads, comes with a paid NASDUCK subscription.
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The latest series values and a keyboard-readable date table are below the chart. CSV and JSON downloads are for NASDUCK paid members.
Use Value for the raw series and % from view start to rebase the first visible value in the current window to 0%.
Dates & readable data
Selected historical events
Curated anchors for market context, rather than a complete news feed. Toggle markers above to place them on the chart.
How To Read It
- A rising Mag 7 line means the biggest growth leaders are still dominating the tape.
- If the ex-Mag7 side starts leading, it usually signals healthier breadth and broader risk appetite.
- The biggest shifts matter when they persist across 1M, 3M, and 1Y views rather than one sharp week.
Next step Charts show what moved. NASDUCK asks why.
Rates, the dollar, oil and gold all end up in the Nasdaq-100 eventually. NASDUCK follows that trail once a week and keeps score on its own calls.