Thu 4 Feb 2010
U.S. Treasury bonds are generally considered low risk investments. They are usually lumped into this category because the chance that the U.S. government will default on its obligation is slight. What many investors fail to consider is that there are many ways in which one can invest in Treasury bonds and they all have varying risk levels.
The risk level is low if an investor is actually purchasing the Treasury bonds themselves and holding them until maturity. For example, consider an investor who purchases a $100,000 10-year Treasury bond paying a 2% yield. If he holds the bond until maturity (10 years) he will receive his original $100,000 back at the end of the period. Along the way he will have received $2,000 per year in yield payments.
But many investors do not want to tie up their investment capital for the periods required by long-term Treasury investments. So instead of buying the actual bonds, they opt for investment vehicles such as mutual funds or exchange-traded funds (ETFs) that invest in long-term Treasury bonds. Sometimes they falsely believe that these other investment vehicles offer the same low risk level as the actual bonds.
In reality, bond mutual funds or ETFs can be quite volatile and offer no real protection against downside risk.
To understand this, take a look at the chart below. The black line reflects the daily price movements of TLT, an ETF that invests in long-term U.S. Treasury bonds. The gold line is the S&P 500, included for comparative purposes.

Over the two years covered by the chart, it is easy to see that the price of TLT has fluctuated dramatically. An investor who purchased at the peak in December 2008 would have seen the value of his investment decline by more than 30% just six months later. That hardly qualifies as a low risk investment.
The blue arrows on the chart point to price gaps. That means the fund opened higher or lower than the prior day’s close. Gaps are usually indicative of an investment that is volatile.
Investors also mistakenly believe that bonds always move inversely to stocks and as a result can be used to hedge against market declines. The red arrows on the chart reflect periods where both TLT and the S&P 500 were falling at the same time.
The volatility of bonds results when investors elect to sell them before maturity. At that point, the price of the bond is determined by what someone is willing to pay. Consider another example. Let’s imagine that an investor pays $100,000 for a 20-year Treasury bond yielding 3%. After five years, the investor chooses to sell his bond. The person buying the bond might not be willing to pay the full $100,000. So he might try to buy it at a discount.
If the bondholder sells his bond for $90,000, it appears as though he lost $10,000. But remember that he received a yield of 3% ($3,000) for each of the five years he held the bond. So he actually gained $5,000 on his five-year investment.
On the other hand, the person who purchased the bond for $90,000 is now going to be receiving the $3,000 per year yield payment. But since he only paid $90,000 he is receiving a 3.3% annual return. In addition, if he holds the bond until maturity, he will receive $100,000. So his original $90,000 investment will return $3,000 a year for 15 years ($45,000) plus an additional $10,000 (the difference between the $90,000 he paid and the $100,000 he received at maturity). That means his overall return will be nearly 4.1% on an annualized basis instead of the original 3% yield.
Obviously this is a simplified example that does not take into consideration tax implications or capital gains or losses.
When hundreds or thousands of such transactions are bundled together inside a mutual fund or some other investment, it becomes easier to see why investing in bonds is not as simple as it seems. Include the fact that many bond traders are speculating on the price based on what they guess interest rates might be 10 or 15 years in the future. Then one can begin to understand why secondary bond instruments can become quite volatile.
Keep in mind that this discussion focused only on long-term U.S. Treasury bonds. There are many other types of bonds such as high quality corporate bonds, zero coupon bonds, high yield bonds, international bonds, and many more. And virtually all of these bonds have derivatives and secondary markets.
So don’t make the mistake of thinking that just because you have invested some of your assets in a bond position the risk of loss is low or a positive return is assured.
F.S.



