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Nasdaq-100 explained: why it moves faster than the S&P 500

The Nasdaq-100 is the fast lane of the US stock market. Same roads as the S&P 500, but fewer cars, and most of them built for speed.

Market guide · 6-minute read · Updated 2026-10-21

At a glance

Banks and other financial companies are left out on purpose. That's one reason it leans so heavily toward tech.

How it's built

Nasdaq builds the index from the largest companies listed on its own exchange, minus financials. It started in 1985.

Weights follow each company's Market cap, but with limits. If the biggest names grow too large, their weights are trimmed so one stock can't run the whole index.

Even with those caps, a small group of giant tech companies makes up a large share of it.

What moves it

• Big tech earnings. A few companies carry so much weight that one report can move the whole index. Most report after the 4:00 pm close.
• Interest rates. Fast-growing companies are valued on profits expected years from now. When rates rise, those future profits are worth less today, so this index often reacts more than others.
• The Fed. FOMC statement at 2:00 pm ET, press conference at 2:30 pm, 8 meetings a year.
• Inflation and jobs. CPI and the jobs report, both at 8:30 am ET, move rate expectations, and rates move this index.
• Tech themes. Chips, cloud and AI news can lift or sink a cluster of members at once.

When it's busiest

• 9:30 – 10:30 am ET: the open. Big candles and fast reversals.
• Midday: often calmer.
• 3:00 – 4:00 pm ET: volume returns into the close.
• After 4:00 pm ET: earnings season. The index itself has stopped, but NQ futures keep reacting.

Those after-hours reactions show up as gaps on the next open. US hours in ET don't change through the year.

Its personality

• Bigger swings. It usually moves more, in percentage terms, than the S&P 500. Up days and down days both tend to be larger.
• Concentrated. A handful of names can decide the day.
• Rate-sensitive. A jump in bond yields can weigh on it even on a day with no company news.
• Fast reversals. Moves can flip quickly, especially near the open and on data days.

More movement means more Volatility. It doesn't mean more opportunity for free. A bigger swing needs a wider stop, and a wider stop means a smaller size.

Reading it with our method

Look at the daily chart first. Mark the last places price turned around and decide the direction: higher highs and higher lows, or lower ones.

Only take trades in that direction on your smaller chart. Use the body-close rule: a candle body must close past a level. With this index's long tails, that one rule filters out a lot of noise.

Then set your stop from the chart and size from it. Futures traders can use the futures tick value calculator; ETF traders, the position size calculator.

Common mistakes

• Using S&P-sized stops. The swings here are wider. A stop that fits the S&P 500 can be too tight here.
• Holding through a giant's earnings by accident. Check the calendar for the biggest members before you hold overnight.
• Ignoring bond yields. Rates can move this index on a quiet news day.
• Thinking it's "the tech index". It's mostly tech, but it also holds retail, health and other non-financial companies.

Questions