Every so often a Seeking Alpha piece crosses my desk built on reasonable math, and this week it's a three-fund portfolio claiming a yield north of 6 percent with growth potential. The funds are VOO, SCHD, and TSPY, blended so that, in the writer's telling, you get an income stream most bond ladders would envy while keeping a foot in growth. I'll leave the exact weights to the source and stick to what the claim means for the rest of us.

I won't quote you component yields here, because I can't verify today's numbers from where I sit, and a stale yield figure is worse than none. What I will say is that whenever someone shows you a blended yield, your first job is to check the pieces. If one sleeve is carrying most of the income, that sleeve is also carrying most of the risk, and yields that high usually mean something in the portfolio is doing work you should understand before you buy it.

What I like about the structure is the discipline of it. Three funds, three jobs. A broad market fund gives you growth, a quality dividend fund gives you cash flow at a low fee, and a third fund rounds out the income. For a retiree who wants cash flow without selling shares in a down year, that arrangement has real appeal. Sequence-of-returns risk, the danger of withdrawing during a crash, is the thing that quietly ruins more retirements than bad stock picks ever have, and dividend income softens it. That's my view, to be clear, not the source writer's argument.

But a 6 percent yield deserves a slow read. Yield and total return are not the same animal, and a fund engineered to pay you more today often pays you less growth tomorrow. If the income-heavy sleeves lag the broader market by two points a year in price appreciation, you haven't gained anything. You've just moved the money from one pocket to the other, with a tax bill for the trouble in a taxable account. And I've written before that your S&P 500 fund is already more concentrated than it looks, so stacking more equity income on top doesn't fix that particular problem.

The other caution is yield gravity. High yields attract people who then treat them as guaranteed, and nothing in equities is guaranteed. Dividends get cut. In 2009, plenty of storied dividend payers trimmed or eliminated their payouts right when retirees needed the income most. A 6 percent blended yield assumes the components hold up, and markets don't check your assumptions first.

My take, then. If you're drawn to this, use it as a starting frame rather than a finished product. Maybe the mix is a broad index fund for the core, a dividend fund for income, and a bond ladder for stability, which gets you the same paycheck without pretending equities are bonds. Size it to your actual spending needs, not to whichever number looks best in a headline. And ask yourself the question that matters more than any yield figure: could your portfolio survive a year where the income and the price both disappoint? If yes, you've built something. If no, no yield on earth fixes that.

Patience and consistency still beat cleverness. They always have.

As usual, this is my perspective, not professional financial advice. Talk to a fee-only advisor before restructuring anything.