One of the bizarre features of the Pension fund led collapse of government bonds prices after the Truss budget was how little many involved in pension fund investing seemed to understand about the way bonds changed in price. For some years when interest rates were artificially depressed by massive official bond buying with newly created money called Quantitative easing, many pension regulators, experts and commentators piled Trustees into UK government bonds as “safe assets” or “matching assets”. They so believed in them they told them to buy many more bonds than they could afford. They put claims on bonds into heavily leveraged funds or LDI funds so the pension fund could own several times what it could afford and only have to pay a small proportion of the cost. The small print said they had to pay up more if the bonds fell in value, but the assumption was the bonds were “safe” and would not tumble.
What they should have known and more importantly should have set out clearly was a government fixed income bond will fall a lot if interest rates go up. The longer the time before the bond repays, the bigger the fall will be. A simplified sum shows why. A bond issues at say £100 and states what the interest will be each year. A 1% bond means the government will pay 1% or £1 on your £100 bond every year until repayment, which is stated as a maturity date. If you lend the government £100 at 1% for a year and rates then go up to 2% the bond will fall in price if you want to sell to £99. The new buyer wants not only the £1 of interest for the year he will own it, but the £1 capital gain he will get when it repays at the original £100 issue value. That then gives him the 2% the market now wants. If you lend the government £100 at 1% with no repayment date, and rates go to 2%, then the value of the bond halves to only £50, as the new buyer wants the £1 of income on the bond to be 2% not 1% of what he invests. The very long dated bonds perform more like the no repayment date bond for obvious reasons.
So many funds bought gilts, UK bonds, at interest rates of around 1%. Look at some of them now. Anyone who lent to the government for 0.5% until 2061 has a bond worth £26.62 today for each £100 of stock . Anyone who lent at 0.875% until 2046 has a bond worth £47.20 today per £100 of stock. Far from being safe and reliable investments these bonds proved to be very volatile and have so far lost their owners more than half their money. Of course if they hold to redemption they will get back the full capital lent, but they will have suffered from a very low interest rate over the whole time of their ownership when deposit rates are now so much higher for less risk and more convenience. Owning a bond that repays in 36 years time means a long wait to get all the initial advance back and a long period of very low returns. It is difficult to see how such an investment matches the liabilities of pension funds, seeking to pay a pension that people would like to go up with prices rather than eroding value as inflation hits.
This is important background for the government as it asks itself if UK pension funds should invest more in the UK, and if they should invest more in shares than in bonds. You can of course more than halve your money by buying the wrong mix of shares at the wrong time just as with long bonds. In good years you tend to make more in shares, as the successful companies which tend to dominate the index grow their profits, earnings and dividends by more than inflation. A matching asset for a pension fund is an asset which over time earns a return that takes care of wage inflation.