You hit the age where the IRS makes you pull money out of your retirement accounts, and you look at the check and think: I don’t actually need this. The mortgage is paid, and Social Security covers the essentials. But that required minimum distribution is going to hit your taxable brokerage account whether you like it or not, and the question becomes what to do with it. If the goal is to keep that money compounding for your heirs, a charity, or just your own peace of mind, three ETFs deserve a hard look: the SPDR Portfolio S&P 500 ETF (NYSEARCA:SPYM), the Vanguard Mega Cap Growth ETF (NYSEARCA:MGK), and the Pacer US Cash Cows 100 ETF (NYSEARCA:COWZ). Each one turns a forced withdrawal into something that keeps compounding.
SPYM: The Core Holding That Costs Almost Nothing
SPYM tracks the S&P 500, which is about as boring and effective as it gets. The reason it belongs in an RMD-reinvestment bucket is the expense ratio: just 0.02%. That means you keep roughly $999.80 of every $1,000 working for you every year. Over a decade of compounding, that gap versus a pricier fund becomes real money for your heirs.
The top of the fund reads like a who’s who of American business: NVIDIA at 7.57%, Apple at 6.66%, Microsoft at 4.91%, Amazon at 3.64%, and Alphabet’s two share classes combined north of 5%. You get broad market exposure with a growth engine baked in. The fund has returned 23.3% over the past year and 311.95% over the past decade on an adjusted basis. It pays a modest quarterly dividend, most recently $0.23923 per share on June 12, 2026, that you can passively auto-reinvest.
MGK: A Growth Tilt for the Long Runway
If SPYM is the anchor, MGK serves as the portfolio’s accelerator. Vanguard’s Mega Cap Growth ETF concentrates on the largest US growth companies, and charges a 0.05% expense ratio. That’s still a substantially low fee.
The performance illustrates why growth-tilted mega caps have earned their spot in a legacy-focused portfolio. MGK is up 19.1% over the last year, 87.97% over five years, and 441.7% over ten years. Dividends are smaller here because these companies plow cash into research and buybacks, but the fund still pays quarterly, most recently $0.0835 per share on June 26, 2026. If your RMD dollars have a 15- or 20-year horizon because you’re planning to pass them on, MGK gives you the reinvestment vehicle to match.
COWZ: Cash Flow Discipline as a Ballast
COWZ takes a different approach. It screens the Russell 1000 for the 100 companies with the highest free cash flow yield, weighting them by cash flow rather than market cap. Fund assets sit at roughly $18.2 billion, with top positions in QUALCOMM at 2.67%, ConocoPhillips at 2.17%, Altria at 2.20%, and CVS Health at 2.16%. Energy and healthcare carry unusually heavy weight, which is exactly why COWZ diversifies away from the tech concentration in SPYM and MGK.
For an RMD reinvestor, the quarterly distributions are the draw. COWZ paid $0.6167248 in late December 2025 and has distributed on a quarterly cadence for nine straight years. It has returned 24.54% over the past year and 226% over the past decade. The variable payout is a feature, not a bug: it reflects the actual cash generation of the underlying businesses.
The Real Trade-Off
These three funds are equity funds; therefore, market risk remains. If you reinvest a full year’s RMD in August and the market drops 20% in September, that money drops with it. You are trading short-term stability for long-term growth, which is the right trade only if you truly do not need the cash and can leave it alone through a bear market. As such, bond funds or a high-yield savings account will feel calmer in a downturn.
However, what you get in exchange is real. A near-zero-cost S&P 500 core, a mega-cap growth engine, and a cash-flow-screened ballast that leans into sectors the other two underweight. For a retiree whose RMD is essentially “house money”, that’s a portfolio that keeps compounding long after the withdrawal clears.
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