NAV erosion: the hidden tax on high-yield ETFs

A 12% yield sounds like a gift. But for a whole category of high-yield ETFs, a big slice of that "yield" is just your own money handed back to you — while the share price quietly grinds lower. We call it NAV erosion, and once you can see it, you can't unsee it.

What NAV erosion actually is

NAV — net asset value — is the per-share value of everything a fund owns. A healthy income fund pays you from what it earns and keeps its NAV roughly stable or growing. An eroding fund pays a distribution larger than it earns, so the NAV drifts down over time. You collect a fat check and watch your principal shrink to fund it.

Why a 12% yield often pays 7%

"Yield" is usually quoted as distributions divided by today's price. It says nothing about whether those distributions were funded by income or by selling assets. The number you actually care about is total return — distributions plus price change. When the price is falling, total return can be far below the headline yield.

What you see	What it can hide
12% distribution yield	Part of it may be return of your own capital
Steady monthly check	A NAV that has fallen 30% over five years
"High income" label	Total return that trails a plain index fund

The option-overlay trap

Covered-call funds like QYLD and NUSI sell upside to generate premium, then pay that premium out as a rich distribution. In flat or falling markets the strategy can look great. But in rising markets the fund caps its own gains — it sold them — so the NAV can't recover the way the underlying index does. Over a full cycle, the price often drifts down while the distribution stays headline-friendly.

The distribution is real. The question is whether it's coming from income or from your principal.

Return of capital

Some of these distributions are classified as return of capital (ROC). ROC isn't always bad — but persistent, destructive ROC means the fund is literally returning your investment and calling it yield. Over years, that's the engine of erosion. The fund's own tax documents (the 19a notices) usually spell out how much of each distribution was ROC.

How to spot it

Compare price then vs. now. If the share price is meaningfully lower over five years despite "high yield," that's erosion.
Look at total return, not yield. Distributions plus price change is the only honest scoreboard.
Read the 19a notice. A high return-of-capital percentage is the tell.
Benchmark it. Did a plain index fund quietly beat it after you count everything?

What we do about it

HeyDividend computes a NAV-erosion verdict on income ETFs so you don't have to assemble it by hand. We track distribution composition, long-run price trend, and total return against a sensible benchmark, then summarize whether the yield is earned or borrowed from your principal. High yield isn't automatically a trap — but you deserve to know which kind you're holding.