State Street SPDR S&P 400 Mid Cap Value ETF (MDYV)

The State Street SPDR S&P MidCap 400 Value ETF tracks an index of mid-sized American companies that appear cheap by traditional financial metrics. Where MDYG (its growth twin) holds companies the market is paying a premium for, MDYV holds companies trading at discounts—lower price-to-earnings ratios, lower price-to-book valuations, higher dividend yields. It is a simple, passively managed fund that costs almost nothing to hold, making it a straightforward vehicle for betting that undervalued mid-cap stocks will outperform their pricier peers over time.

The value proposition in plain terms

Value investing starts with a simple observation: markets sometimes misprice stocks. A company might be trading cheaply because investors are pessimistic, because it is unfashionable, or because bad news has created a panic. But cheap does not mean bad. Sometimes a stock is cheap because its business is out of favour but fundamentally sound—it still earns profits and pays dividends, yet the market is pricing it as if it will collapse.

MDYV buys these kinds of stocks in bulk. Rather than trying to pick individual undervalued companies (which requires research and skill), the fund applies simple, mechanical rules: it buys the 200 or so mid-cap stocks with the lowest valuation ratios. Low price-to-earnings, low price-to-book, high dividend yield—these are the hallmarks of value. The S&P MidCap 400 Value Index automates this selection, and MDYV simply holds whatever the index says.

The logic is that cheap stocks, on average, have historically outperformed expensive stocks over long periods. This is sometimes called “mean reversion”—prices that have fallen too low tend to bounce back. An investor patient enough to hold while the market ignores the values in MDYV’s portfolio may eventually be rewarded.

Why mid-cap value is different from mega-cap value

The value label sounds simple, but it behaves very differently depending on company size. Mega-cap value stocks include businesses like major banks and energy companies—large, established, profitable, and slow-growing. Mid-cap value stocks include smaller industrial manufacturers, regional banks, and companies in less trendy sectors. These businesses are more vulnerable to economic downturns, have less pricing power, and can disappear more easily through acquisition or bankruptcy.

This size difference matters. A mega-cap value stock is a mature business with durable economics; a mid-cap value stock might be cheap because it faces genuine structural decline. MDYV does not distinguish between the two. It holds whatever the index selects, trusting that enough will work out to make the diversified bet pay off.

The flip side: mid-cap value companies are often overlooked by large institutional investors who focus on mega-caps, which creates a larger opportunity for misprice correction if sentiment swings. A small-cap value stock that is truly neglected might experience a sharper rerating than a large, widely-covered mega-cap value stock.

How distributions work in a value fund

Value funds historically have paid higher yields than growth funds because they hold dividend-paying companies and because dividends are one of the factors the index uses to classify stocks as value. MDYV’s portfolio includes many dividend-paying companies—utilities, financial institutions, and industrial businesses that generate stable cash and return it to shareholders.

These distributions are one source of return for MDYV holders. Over a typical year, MDYV might yield 2.5% to 3.5% (meaning shareholders receive that much in dividends relative to the fund’s net asset value). The other source of return is price appreciation—if the stocks in MDYV become less undervalued and the market rerates them higher, the fund’s share price rises.

For investors in taxable accounts, the combination of dividend income and capital gains can be tax-inefficient if the fund is in a brokerage account and not a retirement account. The dividends are taxed every year, regardless of whether the investor has sold shares. (In an IRA or 401k, distributions and capital gains are not taxed annually.)

When value works and when it doesn’t

Value has been a powerful long-term strategy in academic studies and historical backtests. Over 30 or 50-year periods, value stocks have returned slightly more than growth stocks, even though they were less exciting to own along the way. This reflects two things: mean reversion (cheap stocks do sometimes bounce back) and a risk premium (investors demand higher returns for holding less glamorous, more stable businesses).

But value goes through long stretches of underperformance. From roughly 2010 to 2020, growth stocks—particularly mega-cap technology—vastly outperformed value. Investors who held MDYV during that decade experienced frustration as the fund went nowhere while mega-cap tech soared. This is not because value is broken; it is because some decades belong to growth and others belong to value.

The risk is that an investor buys MDYV when value is out of favor and holds hoping for mean reversion that takes 15 years to arrive—only to find that the entire thesis has changed (perhaps value outperformance was a feature of a lower-inflation era that has now ended, or the mid-cap segment has been hollowed out by consolidation). Long-term value investing requires patience and conviction that you are not catching a falling knife.

The index construction and turnover

The S&P MidCap 400 Value Index is reconstituted periodically (typically quarterly). Stocks are classified as value or growth using a formula that looks at valuation ratios, so as valuations change, stocks can flip categories. A company that has become less cheap may be reclassified as growth and removed from MDYV; a company that has become cheaper might enter.

This means MDYV naturally sells its winners (stocks that have recovered from cheap valuations and become less cheap) and buys new losers (stocks that have recently become cheap). Rebalancing does have trading costs and can generate capital gains, though MDYV’s passive structure keeps these minimal. Over long periods, this “sell high, buy low” mechanical rebalancing has often been favorable to value investors, but again, it assumes the strategy itself works over the horizon you are holding.

Practical considerations for holding MDYV

MDYV is most appropriate for investors who believe value will outperform over their time horizon and who can tolerate the years when it does not. It is also suitable as a diversifier for someone overweighting growth elsewhere in their portfolio. The fund’s expense ratio is very low (under 0.20%), so the drag from fees is negligible.

MDYV is less appropriate for traders—mid-cap value stocks are less liquid than mega-cap stocks, and bid-ask spreads widen during market stress. It is also less suitable for those with short time horizons, because value’s outperformance has historically taken 3-to-10 year periods to materialize.

To evaluate MDYV, check its top ten holdings and understand what kind of businesses they are—are they genuinely undervalued, or are they cheap for good reason? Compare its price-to-earnings and price-to-book metrics against the broader market to see how cheap it truly is. Review the fund’s performance during periods of market stress to understand how volatile it gets. And be clear with yourself about why you are owning it: if you simply want mid-cap exposure, a broader index fund is cheaper and less volatile; if you believe value is a favourable long-term bet, MDYV is a simple, low-cost way to make that bet across 200 mid-cap companies at once.