Lesson 3 of 6 · Market guides

How do stock indices like US30 and NAS100 move?

Intermediate3 min readMyFundedCapital Research · rules as of 17 Oct 2026

Short answer

An index tracks a basket of large stocks, so it moves with earnings, interest rates and the US open. This lesson is general market education: MyFundedCapital doesn’t offer index trading yet.

01

US30 tracks 30 large US companies; NAS100 tracks the largest Nasdaq companies and leans to tech.

02

Most index movement clusters around the US cash open and major US data.

03

MyFundedCapital doesn’t offer index trading yet; MFC Stocks covers 1,500+ US stocks.

What an index is

A stock index measures a basket of shares. US30 is the common trading name for the Dow Jones Industrial Average, 30 large US companies weighted by share price. NAS100 tracks the 100 largest non-financial companies on the Nasdaq and is weighted by size, so a handful of large technology names move it most.

Trading the index means taking a view on the whole market or a sector at once, instead of on one company. One company’s bad news matters less; the broad mood matters more. An index tends to move more smoothly than a single share, but it can still jump when its largest members report or when the whole market reprices.

ResistanceSupportBreakout
Support and resistance zones

What moves indices and when

  • The US cash open. The first hour after 09:30 New York time is usually the busiest of the day.
  • Earnings season. Results from the largest companies can move NAS100 on their own.
  • Rates and inflation. CPI, jobs data and central bank decisions shift what investors pay for future profits, and growth-heavy indices react most.
  • Risk sentiment. In a sell-off, indices often fall together and fast.

Outside the cash session, index prices still move on futures trading, but liquidity is thinner and gaps around the open are common.

Many index traders wait out the first 15 minutes after the open, let the opening range form, and then trade a break of it with the stop on the other side.

Sizing by points

Indices move in points, and each contract has a dollar value per point. The formula is the same as for any market: size = risk in dollars ÷ (stop in points × value per point).

Worked example, with a hypothetical $1 per point per contract: a $10,000 account risking 0.5% risks $50. A 50-point stop costs $50 per contract, so the size is 1 contract. On NAS100 a 50-point stop can be tight on a busy open, so the right stop may be wider and the size smaller.

Indices and MyFundedCapital

MyFundedCapital doesn’t offer index trading yet. None of the programs lists US30, NAS100 or any other index, so read this lesson as general market education: it helps you understand what the US open and the big releases do to the whole market.

If you want US equity exposure today, MFC Stocks trades 1,500+ US stocks in the regular session, with a daily pause of 2% and a maximum loss of 5%. A stock is sized the same way: shares = risk ÷ stop per share.

The index lessons carry over: know when the session is busiest, watch the big US releases, and size from the dollar distance to your stop.

Quiz

Check yourself

0 / 3

1When are US indices usually most active?
2Risk $50, stop 50 points, $1 per point. What size?
3Does MyFundedCapital offer index trading today?

Questions

Why do US30 and NAS100 sometimes move differently?

US30 is weighted by share price and holds more industrial and financial names; NAS100 is weighted by size and is dominated by technology. Tech news can move one far more than the other.

Can I trade indices at MyFundedCapital?

Not yet. No MyFundedCapital program offers index trading today. For US equity exposure, MFC Stocks covers 1,500+ US stocks.

Related lessons

  1. How do you trade US stocks around earnings on a funded account?Market guidesIntermediate3 min
  2. What are the MFC Stocks trading hours and daily cut-off?MFC StocksEssential3 min
  3. How do you trade economic calendar events like NFP, CPI and FOMC?Market guidesEssential3 min

Rules shown here come from the help center and the live rulebook; your program terms apply.

Bogdan Rubtsov, CEO and founder of MyFundedCapital

Bogdan Rubtsov

CEO & Founder

“Traders shouldn’t have to beg for capital or guess the rules. So every MyFundedCapital program has its own rulebook, and you can read it before you pay. We ask one question: can you manage risk? If you can, you’re welcome here. If a rule ever feels unclear, that’s ours to fix.”

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