Invesco S&P 100 Equal Weight ETF (EQWL)

The Invesco S&P 100 Equal Weight ETF (ticker EQWL) is a mechanical, disciplined bet against concentrated wealth in the stock market. It holds the hundred largest US public companies — the size threshold that defines the S&P 100 index — but gives each one exactly the same dollar amount, then rebalances every quarter to maintain that equality.

Before equal weighting: the S&P 100 itself

The S&P 100 is not well known to ordinary investors, but it is the threshold that separates the truly largest, most liquid US companies from the rest. If the S&P 500 is the broad market, the S&P 100 is the core: the hundred most valuable firms by market capitalization. Invesco offers a straightforward market-cap-weighted version of this index, weighted according to how big each company is. That is the ordinary bet — own large companies in the proportions the market has decided they should be.

EQWL inverts the approach. It owns the same hundred companies but strips away their market weights. Instead of holding Apple as thirty percent of the portfolio and a smaller firm as one percent, EQWL holds both at the same size: one percent each. This forces a choice at every rebalance: Apple’s market value may have grown to $3.5 trillion while another company stayed at $800 billion, but EQWL treats them the same. When the fund rebalances, it sells Apple (buying low) and buys the smaller firm (selling high).

The history of the equal-weight shift

Equal weighting is not new, but it became more popular in the 2000s when academics and market observers began to question whether cap weighting always made sense. The logic is simple: concentration in a handful of giant firms might reflect irrational exuberance rather than rational valuation. If so, a more balanced approach — giving less weight to whatever has become most expensive — could work better.

EQWL launched in the context of that shift in thinking. By focusing on the top hundred — large enough to trade easily, but substantial enough to capture meaningful breadth — it offered a middle ground. You get the stability of very large companies, but you also get the discipline of equal weighting.

How the rebalancing works

Every quarter, EQWL’s portfolio managers calculate total assets under management, divide by one hundred, and adjust every position to equal that amount. If a position has grown larger due to share-price appreciation, they trim it. If it has shrunk, they add to it. The mechanics are straightforward, but the consequences are persistent: the fund is always selling winners and buying losers, which is a rough form of disciplined rebalancing.

This creates a well-known effect: when the market is in a sustained rally where large-cap stocks are outperforming everything else, equal weighting becomes a drag because the fund is constantly trimming the leaders. But when concentration becomes extreme (as it was in 2023, when the “Magnificent Seven” tech stocks dominated indices), equal weighting provides a hedge, forcing the fund to reduce exposure to the most crowded positions.

Costs, efficiency, and the rebalancing burden

Invesco manages EQWL as a passive fund — there is no active stock selection, just a rule applied mechanically — so the expense ratio is low, though slightly higher than a simple cap-weighted index of the same holdings because the quarterly rebalancing requires selling and buying across the entire portfolio. Over time, this drag can accumulate.

The tax efficiency depends on account type. In a taxable account, the quarterly rebalancing can generate capital gains when the fund trims winners, which can lead to unexpected year-end distributions. In a tax-deferred account (a 401k or IRA), this tax drag disappears, making EQWL more suitable for those vehicles.

When equal weighting on the S&P 100 makes sense

The strategy works best when:

The top hundred stocks have become meaningfully overweighted relative to their economic importance, creating a bubble in large-cap stocks.
The investor believes in mean reversion — that valuations eventually normalize and winners become expensive while losers become cheap.
The investor has a long holding period and can tolerate the underperformance that comes during momentum-driven markets.

The strategy struggles when:

The largest companies truly are the best companies, and their dominance reflects genuine competitive superiority rather than excess.
Momentum and “winner take all” dynamics persist for years, rewarding cap weighting.

Performance and the difficulty of timing

From 2009 to 2019, EQWL underperformed a cap-weighted S&P 100 because the largest tech companies (Apple, Microsoft, Google, Amazon) drove most of the returns. From 2020 to 2022, equal weighting performed better as the fund’s exposure to energy and industrials paid off. In 2023, as mega-cap tech continued to dominate, EQWL again lagged. The pattern is clear: equal weighting works when the market is wrong about relative valuations, and fails when the market is right.

Investor profile and research

EQWL suits investors who believe that value investing — the practice of buying undervalued stocks — works best when applied mechanically through rebalancing, rather than through active judgment. It is not a bet against large companies, but a bet against the extreme concentration that cap weighting can create. The fund is transparent; holdings and weights are published, and the rebalance schedule is known in advance. Anyone considering it should look at how concentrated the market has become (comparing the market-cap weight of the top ten stocks versus their equal weight), and ask whether that concentration reflects durable competitive advantage or temporary market enthusiasm.