iShares Russell 1000 Growth Fund (IWF)

The iShares Russell 1000 Growth Fund — ticker IWF — holds five hundred of the largest U.S. companies. These are the firms that investors expect to grow faster than the overall economy, and they are priced expensively because of that expectation. If you buy IWF, you are betting that companies willing to put profits back into the business will outrun companies that hand profits to shareholders as dividends.

What growth stocks are and why they cost more

A growth stock is simple to understand. It is a company that investors expect to grow its earnings faster than the typical large company. Because of that expectation, people will pay a higher price per dollar of current earnings — a higher price-to-earnings ratio — than they would for a slower-growing firm. Amazon at one point traded at a hundred times earnings. A utility trades at twelve times earnings. Both can be sensible purchases; the difference is the growth story baked into the price.

IWF holds the five hundred companies in the Russell 1000 that the Russell methodology defines as growth stocks — the expensive half. This is not the half with the best earnings growth, but rather the half with the highest valuations by their chosen metrics. So IWF will hold some companies that grow earnings thirty percent per year, and some that grow five percent per year. What they share is that investors are willing to pay a premium for them.

This methodology means IWF is tilted heavily toward technology, consumer services, and healthcare — sectors where large companies can grow faster than average because their markets are expanding, because they have pricing power, or because innovation is ongoing. You will find software companies, semiconductor makers, e-commerce firms, and biopharmaceutical companies in IWF. You will rarely find utilities, banks, or oil companies.

How growth stocks behave

When the economy is expanding and investors are confident, growth stocks tend to outperform. When interest rates are falling, which makes future earnings more valuable in today’s dollars, growth stocks tend to rise faster than the overall market. This is because the math of a discounted cash flow — the way you calculate what a future stream of profits is worth today — is very sensitive to the interest rate you use. A company whose profits are expected far in the future (a typical growth stock) sees its value spike when rates fall. A company paying dividends today (a typical value stock) is less affected.

But the flip side is real. When interest rates are rising, when the economy slows, or when investors lose confidence in the growth story, growth stocks can fall faster than the broader market. A stock trading at a hundred times earnings has nowhere to hide if growth disappoints — the price collapses because the only thing justifying the valuation was the expectation of rapid expansion.

IWF therefore is not a stable investment in the way that a dividend-focused fund might be. It is volatile. It will have stretches where it outperforms by a wide margin, and stretches where it underperforms for years. This is the bargain you make when you buy growth: higher expected returns if the growth narrative holds, but greater short-term pain if it does not.

The concentration in tech

Because IWF is cap-weighted (larger companies get more weight) and because the growth methodology favors expensive stocks, a handful of mega-cap technology companies will always make up a large chunk of the fund. Apple, Microsoft, Nvidia, Tesla, Meta — whatever the current mega-cap growth darlings are — will be overrepresented relative to the market as a whole.

This matters. IWF in recent years has been extraordinarily concentrated in technology, which means that when big tech is rallying, IWF does great, and when big tech stumbles, IWF does poorly. You are not quite buying “five hundred companies”; you are buying “the five hundred most expensive companies, which happen to be dominated by a few dozen tech giants.”

How to think about IWF as a choice

The comparison that matters is between IWF and IWD, the Value fund. Both are passive, low-cost, and tracked faithfully by iShares. The question is which growth regime you expect to work out better: a world where expensive, fast-growing companies keep justifying their valuations and outrun slow-growing, cheap ones, or a world where valuations mean-revert and cheap gets better.

Over the very long term — decades — the two have roughly balanced out, with periods where growth dominates and periods where value dominates. IWF is for investors who expect growth to outperform, or who simply want the exposure to faster-growing companies. It is volatile, it leans heavily toward technology and innovation-driven sectors, and it will feel great in some years and painful in others. But the companies inside tend to be world-leading, capital-efficient, and capable of sustaining higher profit growth than the average large company.

The fund costs very little to hold and is deeply liquid. But it is not a set-and-forget holding for conservative investors. It is a bet on growth, clearly stated.