The value of your pension and the value of your house (Professor Mike Otsuka)

Professor  Mike Otsuka, teaches at the  LSE , he’s written about First Actuarial’s approach to valuing pensions in this blog, the original of which you can find here. People understand houses and know that it’s only when you come to sell one (or mortgage one) that you need to have a valuation.

In this really helpful blog, he explains how trustees and members in defined benefit pension schemes can focus on paying pensions  , as buy to let investors focus on paying the mortgage.

The references to USS are to the University Superannuation Scheme – a subject clearly close to the good Professor’s heart!


Though on a much larger scale, the income and outgo of USS is structurally similar to that of a landlord with a buy-to-let mortgage, who is able and willing to hold onto his flat and rent it out for the next several decades. The landlord’s liabilities consist of regular and fairly invariant mortgage payments stretching over decades. USS’s liabilities consist of regular and fairly invariant pensions payments stretching over decades. The landlord’s income consists of the tenant’s rental payments, which are also regular and fairly invariant. USS’s income consists of employer and employee pensions contributions, plus investment income from the assets in the pension scheme, the combination of which is also regular and fairly invariant.

In order to determine whether his small business arrangement is solvent, the landlord should make a best estimate, on the evidence available, of his expected rental income and mortgage payments, and make sure that the income stream of the former is sufficient to cover his monthly mortgage liability.

Let us now suppose that our landlord is faced with regulations that impose the sort of funding requirements that private occupational pension schemes face. Such regulations would call for a triennial ‘mark to market’ valuation to determine whether or not this buy-to-let scheme is ‘underfunded’. Such a valuation takes the market value of his asset — his flat — at a given date once every three years and arrives at an estimate of whether the value of this asset is at least as great as the sum total value of his liabilities — the mortgage payments he owes in all future years. The value of these liabilities is discounted, to allow for the fact that there will be annual returns on the asset to help cover the cost of the liabilities. The estimated rate of return on this asset is known as the ‘discount rate’.

The most sensible way for the landlord to determine such a ‘discount rate’ is by reverse engineering a rate of the return on his asset from his independently derived expectation of rental income. Suppose, for simplicity, that he expects to receive £1,000 per month in rental income, and therefore £12,000 per year, for the next several decades. If his flat happens to be valued at £200,000 on the valuation date, he will divide £12,000 by £200,000 in order to derive a rate of return of 6%. If there is 7% housing inflation per annum between that valuation date and the next one three years later, so that his flat is worth £245,000 by then, then he will divide £12,000 by £245,000 in order to derive a new rate of return of 4.9%.

In estimating his rental income, it would make little sense, by contrast, for our landlord to adjust it upward or downward significantly on the basis of fluctuations in the market value of his flat. This is because, as this graph shows, the market value of a flat fluctuates to a much greater extent than the rental income on that flat.

Annual percentage changes in housing prices versus rental returns in England

For the upcoming valuation of USS’s pension scheme, UCU’s actuary First Actuarial is advocating what I have described above as the most sensible way to determine the discount rate. USS’s actuary, by contrast, advocates a method of valuation along the lines of the one I have described above as making little sense.

On First Actuarial’s recommended approach, one first arrives at a best estimate of cash flows from investment income on the assets that the pension scheme holds. Then one reverse engineers a discount rate by dividing this best estimate by whatever the market value of the assets happens to be at the date of valuation. Here, in more detail, is how First Actuarial describes their approach:


6.11 In the >99% likely scenario of USS continuing as an open scheme sponsored by employers with a robust covenant, a good way to plan the contribution needs of the scheme is as follows.

6.12 The long run issue is the growth of asset income. A scheme which is open to new entrants has little need to buy assets (unless its membership is increasing) or to sell them (unless the membership is declining or the benefits have been cut). A valuation which plans for the >99% likely long term ongoing scenario would:

· Estimate the income expected from the assets (prudently, for a SFO [Statutory Funding Objective] valuation).

· Because the assets must be shown at market value, derive the rate of return which values the expected income at the assets’ market value (the internal rate of return).

· Use the internal rate of return to value the liability cash flows.

6.13 In this way, the ongoing planning valuation builds in a projection of asset income for comparison with the liability outgo. The prudent expected return on the actual assets of the scheme is incorporated. The cash flows of the scheme, on both sides of the balance sheet, are modelled and planned for.

In the first bullet point in 6.12 above, First Actuarial is proposing that USS provide a best estimate, based on all the data available to them, of annual investment income, mainly from dividends from the stocks and coupon payments from the bonds they hold, and then prudently adjust these cash flows downward.

In accordance with the second bullet point, that prudently adjusted estimate is then divided by whatever the market value of USS’s assets is at time of valuation.

This generates the discount rate (i.e., the third bullet point).

USS’s actuary resists the second bullet point because they maintain that one should instead derive information about future income from the current market value of assets, where it is assumed that such income is a relatively fixed percentage of the market value of assets, rather than offering an independent estimate of such income.

As First Actuarial notes at 6.18 of the same document, USS’s approach would be misguided when it comes to an estimation of income from bonds, where one takes the stated fixed coupon payment and divides it by the current market value of the bond to derive the yield.

6.18 Second, if the market movement is a move in the bond markets, then a corresponding change in the internal rate of return would not be disputed.

As I illustrated earlier, it would also be misguided for the owner of a buy-to-let flat to estimate his rental income as a relatively fixed percentage of the market value of the flat.

Is it sensible, by contrast, in the case of stocks, to suppose that dividend income will closely track the market value of the stock? This is what First Actuarial says at 6.19–6.22, which strikes me as sound:

6.19 It is in connection with a move in the equity markets that the question is raised. Does a 10% fall in market value signify an imminent and permanent 10% fall in dividends? If it does, the expected return on equities has not changed.

6.20 We cannot tell whether a short term market fluctuation signifies a move in dividends or not. We have to wait and see the dividends which emerge to distinguish noise, false expectations and irrational behaviour in the markets from a rational and precisely correct response to news affecting dividends.

6.21 The USS net cash flow position is not such that it need worry about short term market value volatility. It can afford to wait and see how dividends change. For a scheme like USS, which has a long term future with robust sponsoring employers, it is emerging fluctuations in asset income which matter most.

6.22 Turning the point around, a 10% rise in equity market value would not improve a cash flow based balance sheet by much either. On the other hand, a liability calculation using a gilt yield based discount rate would show an improvement in the balance sheet equal to the equity market rise. This is potentially imprudent, if the market rise is noise, false expectations or irrational behaviour in the markets rather than a rational and precisely correct response to news increasing dividends.

(See also this related public Facebook post, which extends an analogy which Dennis Leech has drawn to negative equity and the USS ‘deficit’.)

The original of Mike’s blog can be found here

About henry tapper

Founder of the Pension PlayPen, Director of First Actuarial, partner of Stella, father of Olly . I am the Pension Plowman
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4 Responses to The value of your pension and the value of your house (Professor Mike Otsuka)

  1. Mike Otsuka says:

    Thanks, Henry, for this cross-posting! If you click a few times to reveal the comments to this public Facebook post on the same topic, you’ll see an illuminating comment by your colleague Derek Benstead about the unrealistic volatility of USS’s own method of valuing the pension scheme:

    Your link at the top of your post to my homepage isn’t working. It should be:


  2. Mike Otsuka says:

    Thanks for cross-posting this, Henry! I linked to my blog post on Facebook, which prompted an illuminating comment from your colleague Derek Benstead. Click here and then click on “Comments”:

    Incidentally, your link at the top of your post to my homepage has got a faulty URL. It should be:

    (Apologies if the above is a duplicate of an earlier comment, which I tried to post.)

    Liked by 1 person

  3. Bob Compton says:

    At long last some sensible independent thinking!


  4. henry tapper says:

    No problem Mike (thanks for the comment Bob). Derek Benstead is our doyen, a kind of Yogi who is rarely seen outside of Manchester but whose precise insights brighten everyone’s lives (within First Actuarial and without)!


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