Financial markets

Buttonwood's notebook

The equity risk premium

Land of the free lunch

Feb 7th 2011, 17:17 by Buttonwood

ENGLAND and America are two countries separated by a common language, said George Bernard Shaw. Certainly, on my trip to the US last week, I found a gulf between my natural British pessimism and the can-do American spirit. In particular, this relates to expectations of future returns.

The standard assumption for pension fund returns is around 8% per annum. This seems to be based on past experience*. Corporate pension funds have a standard 60/40 asset split; state funds may be 70/30 (instructive that they are taking more risk on the taxpayers' dime). Treasury bonds yield 3% or so, which means the fixed income portion of a state's portfolio is generating 0.9%; the equity portion has to generate the other 7.1%, which equates to 10% a year.

How likely is that? It is a truism to say that equity returns come from three sources; the dividend yield, dividend growth and the change in the price/dividend ratio. This latter figure reflects the re-rating or de-rating of the market. If the dividend is unchanged, then a shift in the market's yield from 3% to 2% means a 50% capital gain. Figures from Elroy Dimson, Paul Marsh and Mike Staunton of the London Business School, in associaiton with Credit Suisse, show that global real equity returns over more than a century have averaged 5.5%. This has been made-up of an intitial yield of 4.1%, real dividend growth of 0.8% and a re-rating effect of 0.5% a year (the US figures are pretty much the same). As you can see, the initial yield is crucial.

So can we get to 10% nominal from current conditions? The S&P 500 currently yields 2.2%. Let's add in a further 1% for buy-backs (which are highly variable). Real dividend growth? Let us assume it doubles its historical average to reach 2% a year. And let us be bold and guess that, even though the market has a lower yield than the average, it does not get de-rated back to the mean, so there is no loss from the third factor. All that gets to 5% real growth; add in 2.5% for inflation (as measured in the bond market) and we get to 7.5% nominal return, before costs. Using those numbers a 70/30 equity/bond portfolio would generate a return of 6%.

What if inflation were higher, say 5%, then could equities generate the 10% return? Alas, it's not that easy. Equities wouild be de-rate in such circumstances; even a move in the yield from 2% to 4% implies a 50% fall in capital values. The bond part of the portfolio would lose money as well.

But that kind of reasoning tended to draw blank stares from my American hosts. Their reasoning was that equities have always beaten bonds (except in the last decade) by a wide margin and will continue to do so. That has been true of the US, where equities have always produced real returns over 20 years, as the LBS/Credit Suisse data show. But it has not been true in Britain; and in France, there have been periods of 60 years or more when equities have not produced positive real returns.

In short, America is the ultimate example of survivorship bias. Go back to 1900 and you might have picked Argentina or Russia as emerging nations with the ability to rival the US but each proved to be a huge disappointment. The equity risk premium is just that; compensation for risk. It cannot be guaranteed.

*Of course, the higher the assumed return, the less the sponsor has to contribute, so there is a bias towards optimism.

UPDATE: Just to respond on the discount rate front, the unions in Illinois were very keen to tell me their pensions were constitutionally protected. In Vallejo, California, bondholders are taking a hit thanks to the ciry's troubles, but not pensioners. So a benefit that can't be cut looks like a pretty solid obligation to me and thus must be discounted at the risk-free rate. After all, companies borrow in the form of long-term bonds; doubtless they expect to invest that money and earn a higher return. But they can't say the bonds should only be valued at 50 cents on the dollar on their balance sheets, because they expect to earn a higher return; the fraud squad would be after them in 5 minutes.

UPDATE 2: On the truism point, this reasoning applies at the market level (this is known as the Gordon growth model). Yes, in terms of individual stocks, owning a dividend-less share implies that the company will start paying dividends later (as Nicrosoft did) or that the company can be broken up (or taken over) and the cash returned to investors. On inflation, the states use nominal numbers which is why I did. There are limited cost-of-living adjustments in most cases. In theory, the problem could be inflated away (creating a problem for pensioners, of course) but the states cannot generate inflation on their own.

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jomiku wrote:
Feb 7th 2011 6:17 GMT

I agree, with two caveats.

1. Political problem: people leap from saying the standard assumption is too high to saying the proper valuation is treasury rates or some other "riskless" method. That is a political statement designed to stoke a crisis mentality, one that demonizes public employees and of course any semblance of a union - as if a union were needed to increase public pensions shared by legislators! Actual discussion of a range of valuation disappears into the rhetoric of horror.

2. Times change. While it is survivorship, we also don't know the future and the people who do the valuations understand two additional points: that shortfalls are more a product of intentional underfunding - e.g., Illinois - and that adjustments which take effect over an extended period of time, meaning decades, will suffice unless underfunding is truly hideous or they handed all the money to a Bernie Madoff.

jimgarland wrote:
Feb 7th 2011 6:27 GMT

You, too, are an optimist. The current forward-looking yield of the S&P 500, according to Standard & Poor's, was 1.83% as of the close of business on last Thursday.

America is a country where investors care far, far more about market values than anything else. Few people care about dividends. Few people even think about forward-looking prospective total returns.

LexHumana wrote:
Feb 7th 2011 6:32 GMT

So at a most optimistic set of variables, most pensions still need to nearly double their return on equities to get close to the valuations they carry on their books? Lovely. I think this qualifies as a good definition of "crisis", regardless of jomiku's optimism.

In reality, pension funds' future liabilities are being discounted far too much, understating what they need as reserves by a huge amount. Thus, the assumption of jomiku that the underfunding can be made up for by small adjustments over a long period of time is untenable -- if the rate of return is truly this dismal, then small increases in pension reserves will not keep pace with the ever-increasing shortfall (remember, pension outflows increase over time as the overall population increases, the number of government workers increases, people live longer and the population of pensioners increases). Unless you properly account for an accurate future liability amount, you cannot calculate the correct amount of the underfunding, and cannot accurately budget for eliminating the shortfall.

My guess is that the true value of the shortfalls are so enormous, that pensions will not be able to get to a proper level of funding without drastic increases in state budgets (and most states cannot afford this). Small changes over time are not going to cut it.

forsize wrote:
Feb 7th 2011 6:51 GMT

an underfunded pension(by a public union) is a political decision to hide the costs from the taxpayers only to slam them with the constitutionally protected bill later.

Feb 7th 2011 7:11 GMT

Equity returns vary a lot depending on the starting year, of course.

Some nice charts for considering this are here: http://www.crestmontresearch.com/stock-matrix-options

The particular chart looking at real stock market returns with reinvested dividends is http://www.crestmontresearch.com/pdfs/Stock-Matrix-Taxpayer-Real1-11x17.pdf

Long term returns of 3 or 4% are very common. Returns of > 9% are rarer than negative returns. Given that the 20th was a good century, I don't think expecting a real return higher than about 4% is reasonable.

Feb 7th 2011 7:14 GMT

Buttonwood, you were using nominal return--- aren't these liabilities inflation indexed? If not there is one ray of hope.

Feb 7th 2011 9:04 GMT

@Joe In Morgantown

Even those charts will overestimate the returns you'll get. Portfolios need to be rebalanced periodically, incurring additional transaction costs. And more importantly, using the arithmetic mean instead of the geometric one makes a big difference, especially for shorter time-periods. Even in the U.S. the equity risk premium is tiny, and certainly nowhere near the 6% "rule of thumb" that many still use.

NotAGenius wrote:
Feb 7th 2011 9:13 GMT

Given how high Price:Trailing 10 years earnings are now, any positive real return expectation for the next 20 years is optimistic.

Feb 7th 2011 10:35 GMT

What confuses me the most is that if equities return around 8% (or even 6%) every year on average, while the GDP increases by only 2-3%, then we see a long-term redistribution of all asset values into equities. This can't possibly last forever, and the long-term return on equities will by necessity be constrained by the risk-free rate. Although, yes, in the long run, we're all dead, so it's perfectly possible that such a value redistribution could take place throughout a person's lifetime but not on longer time scales, I would be leery of any investment strategy that guarantees (or, even worse, operates on the assumption of) a return greater than the long-term NGDP growth rate, discounted by population growth. If you can, it had better be arbitrage. Otherwise, it's likely just plain false.

Pacer wrote:
Feb 7th 2011 10:55 GMT

Trying to learn more - A dividend yield that exceeds GDP growth is no problem--distributed earnings are a component within GDP. Of course GDP is a flawed measure full of double-counting, but that's for another day.

It would be--as you say impossible in the longer term--for the growth in dividend yields to outpace GDP expansion. In thory, we might see the dividend growth rate exceed that of GDP for awhile, if profits from offshore activities were substantial for the index concerned and rising more rapidly than the home economy (or alternatively falling more slowly).

john27 wrote:
Feb 8th 2011 1:58 GMT

How could this be a truism? "It is a truism to say that equity returns come from three sources; the dividend yield, dividend growth and the change in the price/dividend ratio. "

What about equities that have no dividend? Does one assume earnings as the surrogate dividend? Or is there a humongous dividend paid when the company winds up 20 years out?

Feb 8th 2011 6:07 GMT

First, I'd like to thank Buttonwood for a very engaging column in the January 29 paper. A few thoughts:

One major goal of funding pensions is to tie the obligation to pay for a pension to the same cohort of ratepayers, customers, etc, who enjoy the services of the employee at the time the employee's pension service is being credited. So on a "micro" level, it makes sense to fund pensions as a matter of proper cost allocation.

On the other hand, if all financial assets are just claims on future incomes or revenues, as the Jan 29 column notes, wouldn't it be just as well on a "macro" level to say "why bother?" funding pensions, because the next generation is just going to have to pay for my retirement one way or another?

Perhaps the balancing point in this micro-macro conundrum is that saving now for future pensions increases the current stock of invested surplus. That in turn lowers the cost of capital and borrowing, which hopefully leads to higher rates of economic growth. It is however, easier to imagine this effect working if the investments support capital purchases (be they public or private) and not operating costs.

On the valuation of equities discussed in the blog above (which is not my area of expertise), it seems that retained earnings are lost in Buttonwood's dividend-driven valuation model. I won't say that retained earnings deserve the same respect as cash dividends, but a complete lack of consideration seems unwarranted. Anyone care to weigh in on this?

Here are some online sources. Not great, but not bad. Anyone care to share better links?
http://www.flatworldknowledge.com/node/29251#web-29255
http://www.capital-flow-analysis.com/investment-theory/earnings-per-shar...

Turning to public pension funds' discount rates, my sense of the field is that investment professionals' prospective expectations for a 70/30 fund are more in the range of 7.0% to 7.5%. This assumes inflation in the 2.5% range. So there is some professional pressure downwards on public pension plans using 8.0%.

Another piece of pressure is coming from the Governmental Standards Accounting Board, which is considering a change to discount rates used for financial accounting (as opposed to discount rates used for purposes of determining cash contributions to pension funds. The proposed change is a composite discount rate, using the expected return on investments (say 8.0%) to the extent the liabilities are funded by invested assets in a trust, and a risk-free rate (4.0%, for example) to the extent that the trust fund is expected to run out of money prior to satisfaction of all liabilities. An interesting compromise.

Mind you, the 8.0% discount rates are also typically applied to a definition of liabilities which factors in future salary and the effect of aging on pension costs: the "entry age normal" method, which is designed to address the cost allocation considerations described above. "Market value" liability measurements using risk-free rates typically consider only benefits earned to date. Not only the discount rate, but also the actuarial cost method matters.

One point of these comments being (I hope not to endlessly repeat earlier comments) that there is a bit more to the story than the headline grabbing (seeking?) claims of those who discount pension liabilities with "risk-free rates", or the "all is well" claims of those who stand to benefit from unrealistic actuarial assumptions. It is a frustrating experience to work on the inside of a profession which gathers occasional but heated attention. There is an awful lot of good academic and professional literature to be absorbed out there. And it is a lot easier to want a conclusion and then seek supportive facts than it is to become an expert and understand all sides of the issue.

Finally, it occurs to me that those who support the risk-free valuation basis for pensions might consider using market annuity purchase rates instead of gilts. After all, if an independent for-profit company will take it off your hands for a certain price, isn't that the very definition of a market value of liabilities? I'm surprised this approach hasn't gotten more play.

Incidentally, I believe insurers face similar challenges in valuing annuities - what mix of assets to invest in, and what discount rate to assume? This subject is not my area, but I would imagine that there is ample reason (regulatory valuation rules aside) to reflect the expected risk premium of invested assets when discounting liabilities. This leads to a similar issue as with pensions - investing in riskier assets leads to lower liability prices, and gaming the assumptions results in more ducats in the pocket today. Is this a flawed model, or a model which requires discipline and regulation of its practitioners? I will continue to argue for the latter.

jouris wrote:
Feb 8th 2011 6:47 GMT

One other bit of pessimism, which I didn't notice being covered: most public entities have the same "feature" in their pension future as other American organizations. Which is that, in the near future they will see a large cohort of Baby Boomers retiring and starting to draw pensions.

This has the unfortunate downside of substantially reducing the time in which small adjustments to funding can be made and still resolve the current shortfall. Actually, the common practice of allowing retirement at a younger age than non-public entities means that that big cohort is going to appear even sooner than elsewhere.

MJaga wrote:
Feb 8th 2011 10:19 GMT

PensionActuaryPDX:
"On the valuation of equities discussed in the blog above (which is not my area of expertise), it seems that retained earnings are lost in Buttonwood's dividend-driven valuation model. I won't say that retained earnings deserve the same respect as cash dividends, but a complete lack of consideration seems unwarranted. Anyone care to weigh in on this?"

Modigliani and Miller's Dividend Irrelevance theorem?

When firms do their capital budgeting 'cost of equity(k)' is all that matters irrespective of how much retained earnings they have. Retained earnings is just another shade of equity capital and market will demand the same return on it.

jim_r wrote:
Feb 9th 2011 3:37 GMT

Buttonwood sez: "Let's add in a further 1% for buy-backs."

Over longer periods, share dilution (new shares) have reduced returns by 1.5% to 2% per year. So shouldn't you be subtracting at least 1% rather than adding 1%?

http://www.efficientfrontier.com/ef/702/2percent.htm
http://www.efficientfrontier.com/ef/102/pie.htm

bcurKnJvxJ wrote:
Feb 9th 2011 7:08 GMT

Why do stock and bond index predictions have anything do with actuarial return assumptions?
http://hedgefund.blogspot.com
Invest in skilled strategies not assets. Use 10% as the long term discount rate.
Don't take ANY beta risk. Long only alpha.

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In this blog, our Buttonwood columnist grapples with the ever-changing financial markets and the motley crew who earn their living by attempting to master them.

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