Where is the
money actually flowing?

Why sectors matter before stock selection

Institutional investors — the funds that move markets — allocate capital at the sector level first. A pension fund doesn’t decide to buy Apple and then discover it’s in technology. It decides how much to allocate to technology, and then selects the best names within it.

This top-down flow means sector strength precedes individual stock strength. When money rotates into a sector, most stocks inside it get lifted. When money exits, even strong individual companies get dragged down with the tide.

Rule of thumb: Studies show roughly 50% of a stock’s movement is explained by the performance of its sector. Find a strong sector first, then find the strongest stock within it — and you have two tailwinds instead of fighting one headwind.

The 11 GICS sectors

The Global Industry Classification Standard (GICS) divides the market into 11 sectors. Each has a widely-traded ETF you can use to track it:

Cyclical vs defensive: two very different jobs

The 11 sectors split broadly into two camps. Understanding which camp a sector belongs to tells you when it should be leading — and where to look depending on the current market regime.

Quick read on regime: When cyclical sectors (especially Tech and Consumer Discretionary) are the leaders on the sector heatmap, it signals confidence. When defensives (Utilities, Staples) take the top spots, it signals risk-off rotation — the market is hedging.

How to use the sector heatmap

MadStocks’s sector heatmap shows the daily performance and breadth of all 11 sectors at a glance. Breadth tells you how many individual stocks inside each sector are advancing vs declining. Here is a simple workflow:

1. Find the top 2–3 sectors by daily % change with strong breadth. A sector that is up 1.5% with 80% of its stocks advancing is genuinely strong. A sector up 1.5% with only 40% advancing is being carried by a handful of large caps — treat it with caution.
2. Watch the A / D (advancers vs decliners) count. High advancers = real, broad participation. High unchanged count = indecision and low conviction. Avoid putting fresh money into sectors where most stocks are flat.
3. Watch what is rotating out. If Energy was the top sector yesterday but has dropped to the bottom today, that is a rotation signal. Money is moving somewhere else. Don’t fall in love with yesterday’s leaders.
4. Match the sector to the regime and VIX. In a bull regime with low VIX: lean into cyclical leaders. In a neutral or bear regime with elevated VIX: even strong cyclical sectors can reverse fast. Size down accordingly.

Sector breadth: the number that matters most

Beyond raw price change, you want to know how many stocks inside a sector are actually up. This is called breadth. A sector can show a positive % change while most of its stocks are actually falling — because two or three large-cap names are dragging the ETF price up.

The MadStocks heatmap shows advancers vs decliners for each sector every session. Focus on sectors that are (1) showing a positive daily change AND (2) have strong breadth (60%+ advancing). Those are the sectors with genuine institutional participation — not just a few giant names masking weakness underneath.

See the sector heatmap live

Check the current sector heatmap before every trading session to orient yourself.

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See today’s heatmap on the MadStocks Sector Heatmap

Sector Heatmap on MadStocks. All 11 sectors are color-coded by performance. Green = leading, red = lagging. The darker the color, the more pronounced the move. Use this to identify where institutional money is flowing today.

Open the sector heatmap now