Towards the end of the 17th century, politicians and bureaucrats in the City of London were facing a problem not unlike the one faced by many aging cities in the early 21st century. For years, they had made promises to pay lifetime pensions to their residents, but hadn’t bothered to properly estimate what those liabilities were currently worth — or how much to set aside to pay pensions. In the same vein, insurance companies were offering individual annuities to people of all ages, but were charging them a flat fixed price regardless of how old or how young they were.
In fact, various kings and queens were in the habit of borrowing money from their loyal subjects, with a promise to pay them back a lifetime pension, but had similarly never bothered to set aside or compute reserves to make those payments. According to some historians, the French treasury issued life annuities instead of regular bonds, at extremely generous yields that were the same for young and old alike. This resulted in the eventual bankruptcy of the treasury, prior to the French Revolution.
Against this backdrop, the Royal Society decided to assign this problem in early 1690 to a young and confident scientist by the name of Edmond Halley. Mr. Halley attacked this problem in a rather novel way and came up with the first formal expression for the value of a pension annuity. Yes, that is the astronomer Edmond Halley with the famous comet named after him, last seen around the solar system in 1986 and next expected to visit in the year 2061.
The astronomer Edmond Halley was a mere 35 years-old when he tackled the pricing of individual annuities, but was already widely known and respected in scientific circles around England and beyond. He wrote a famous article, which was eventually published in the year 1693 by the Royal Society in its Philosophical Transactions, where he displayed the first reliable life table. He also took the opportunity to summarize his thinking about mortality rates as a function of age, and, most importantly, laid down the foundations for determining what a pension annuity is worth.
Why a famous astronomer — who spent his time gazing at stars and comets in far-flung observatories around the world — would have been interested in working on a rather morbid problem of determining mortality rates is rather puzzling. One can speculate that his sudden interest in death might have been kindled by the fact that his father — also called Edmond Halley, a wealthy aristocrat and businessman — was alleged to have been involved in the Rye House plot.
Ok. I’ll get back to that story and the problems this caused Edmond (junior) Halley the astronomer, later.
Take the Pension or a Lump Sum?
Nowadays, most large employers around the world — whether in the public or private sector — offer some sort of retirement savings plan to their workforce. Would you rather get a lifetime pension annuity of $1,000 per month, or a lump sum of $300,000? Are you better off taking the money out of a retirement savings plan and buying your own pension annuity? There are some tough questions people face as they near retirement, and this is precisely where Edmond Halley’s pension annuity equation comes in really handy.
In sum, having an equation to figure out what a pension annuity is worth, or what it might cost to buy one, is clearly one of the most important issues that must be contemplated around retirement. For many retirees, it is the single most important decision they face.
As you can see from the table, if you wait to purchase your pension annuity until a later age, it will be cheaper. Likewise, if interest rates move-up, your pension will become cheaper to acquire as well.
Imagine that you are 70-years-old, and entitled to a pension annuity of $3,000 per month starting immediately. Further assume that your employer offers you a lump-sum of $306,000 now, instead of the pension annuity. So, should you take the money or keep the pension? This sort of dilemma is faced by hundreds of thousands of people, annually, as they approach retirement. But here is how to address the financial aspects. The $3,000 monthly pension is $36,000 annually. The $306,000 that you are being offered to walk away, is exactly 306/36 = 8.5 times the annual income. Now, look at the column under the age of 70. You will see that the value of 8.5 is in between the interest rate of 7% ($8.74) and 8% ($8.16).
What does this mean? Well, the $306,000 the company is offering you to forfeit the pension, is a good deal, only if interest rates in the market place are higher than 7.5%. Under those conditions you are getting a fair deal. But, if market interest rates are at 6%, then you aren’t getting a very good deal — they should have offered you a larger lump sum — and you are probably better off taking the pension annuity.
Back to Halley’s History
The circumstances surrounding the death of Edmond (senior) Halley remain a mystery to this day, with some arguing that he committed suicide — perhaps out of fear of his involvement in a lurid royal plot? — and the police claiming he was murdered by petty thieves.
One thing is for certain — the stress around the death of his father distracted him from his astronomical research and he did very little formal work around the time. The one thing he did — in marked contrast to all his other work — was write a paper about calculating life and death, and computing insurance and annuity values. Perhaps it was on his mind.
Halley’s Comet has had quite a profound impact on people over the years. The great American writer and satirist Mark Twain said the following, according to his biographer. “I came in with Halley’s Comet in 1835. It is coming again next year, and I expect to go out with it. It will be the greatest disappointment of my life if I don’t go out with Halley’s Comet.”
In ancient times comets were often blamed for floods, earthquakes, disease and destruction. And, Halley’s comet welcomed more than a fair share of bad news. Its first appearance in the Common Era took place in the year 66, which was on the eve of the rebellion and eventual destruction of the Jewish temple by the Romans, memorialized in a drawing of Halley’s comet over the city of Jerusalem. The list of momentous (sad) historical events continues thorough the ages, including its appearance in 1759 — the year of Halley’s vindication — corresponding with the Conquest of Canada.
The next appearance of Halley’s Comet — technically the perihelion, when it comes closest to the sun — is scheduled for the 28th of July 2061. On that particular date I hope to be retired, approaching the age of 95 in good health — trying to beat the Gompertz odds — and enjoying my wife, kids and grandkids, living off my university pension which is quite valuable according to Halley. And, unlike Mark Twain, I hope not to go out with it.
Reprinted by permission of the publisher, John Wiley & Sons Canada, Ltd., from The 7 Most Important Equations for Your Retirement, by Moshe A. Milevsky. Copyright © 2012 by Moshe A. Milevsky