Stock/Bond Combo Is Best for Higher Retirement Spending: Morningstar

Analysis December 07, 2021 at 12:56 PM
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For advisors, or their clients, who might be nervous about having too much retirement savings in stocks — believing the end is near — there's another option that Morningstar Vice President of Research John Rekenthaler covers in his recent column "Asset Allocation for Retirees: What Will the Future Bring?"

The answer: A good old-fashioned blended portfolio may provide the best safe withdrawal rate option.

Rekenthaler has discussed the virtues of a heavily weighted stock portfolio in retirement by looking at the history of stock returns.

"History's lesson is straightforward: the more stocks, the merrier. Investing entirely in equities consistently generated either the highest safe spending rate for a given 30-year period or a rate that wasn't far off the mark. What's more, all-equity portfolios were much likelier to deliver a happy surprise than to disappoint," he states in his column " Better Stocks Than Bonds in Retirement."

An Alternative View

Yet there's a caveat, "The precept of 'the more stocks the better' assumes that the future will look something like the past."

Further, he says the "better stocks" study has a small sample size (three independent 30-year periods spanning a century), and "stocks have become unusually costly. History may thus prove an unreliable guide."

He also points out the equity forecasters at Morningstar believe that "the next 30 years' stock returns are muted."

But are bonds, which they also expect to have weak performance, the answer? In fact, despite "muted" equity returns, Morningstar's real annualized 30-year returns projected for 2021 for stocks is 4.58% while for bonds is 0.18%.

That said, stocks, too, are in a precarious position, as he notes, "I realized that stocks have recorded 5% real annualized gains over several 20-year periods, including from 2000 through 2019. So, it scarcely seems unreasonable to believe that they could do so for the next 30 years."

But he points to the current 30-year Treasury Inflation-Protected Securities yield that is a negative 0.56%, meaning those invested are accepting a half percentage point per year less than the inflation rate. "In that light," he writes, "expecting even a slight gain from bonds seems reasonable."

In his analysis, he looks at three return combinations: 100% stocks; 50% stocks, 40% bonds and 10% cash; and 90% bonds and 10% cash, and how each combo and what group provided the best spending — or withdrawal rates — in different 30-year periods (1930, 1960, 1990 and projected 2021).

The precaution of reducing withdrawal rates was covered in a previous Morningstar study; however, Rekenthaler notes that in all the periods looked at here, withdrawal rates were highest with the combined stock/bond portfolio.

For example, in the period for 1990, the heavy stocks portfolio withdrawal rate was 5.1%, bonds portfolio was 4.5% and the combination was 5.3%. Likewise, the safe projected withdrawal rates starting in 2021 were stocks at 2.9%, bonds at 2.7% and the combo at 3.3%.

Bonds, he notes, should "nearly match" the stock spending rate because, as Morningstar forecasters believe, in the past stock returns compensated for volatility, whereas that probably won't be the case in the future.

Further, highlighting the returns of the balanced portfolio, he states, "The best time to diversify is when investments have become expensive, implying that returns may be weak."

Rekenthaler concludes that those advisors, or clients, who "believe that the stock market may have finally exhausted its good fortune, such that any downturn will not promptly be followed by a sharp rally" should think about reducing equity weighting to 30% to 50%.

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