Last November 10th, I wrote how U.S. long bond yields were at record lows in a bond market that had experienced, with some interruptions, a record 30-year secular bull run. From the double-digit peaks of interest rates in 1981 as the U.S. Federal Reserve Board and other central banks sought to and succeeded in breaking the back of inflation, rates have slid more than 10% from each maturity point on the yield curve, down to below 3%, even for the most volatile maturities.

Mea Culpa, But Thesis Still Not Dead (Just Resting)

At the time I wrote the opinion piece, I contended that this very long bull run in bonds was destined to come to an end, if not right at that time, then soon. Well, ‘soon,’ in a historical context, should we look back in hindsight a few months, quarters or years from now, did not turn out to be imminent. There are a number of possible reasons for that, which I will get into a bit later.

Rates have continued to fall, and the 30-year Treasury, which I consider the true benchmark, now yields just under 2.6%. In November, its yield was around 2.9%. The change is small, in absolute terms, but important for capital appreciation. As interest rates fall, bond duration increases and approaches that of the bond’s maturity.

Duration Rising, Important to Bond Returns

‘Duration’ is the present-value weighted average timing of the cash flows of a financial instrument, such as a bond. A zero-coupon bond has a duration equal to that of its maturity. A change in interest rates for a zero-coupon bond directly changes its price by the same percentage amount, times its maturity. A 0.3% (30 basis point) change in the yield will cause a 0.3% change in the price of the bond times its maturity, or, in the case of a thirty-year zero-coupon bond, 9%. That is a big move for a conservative investment, and in a short period of time.

Treasury bonds are not principally issued in the zero-coupon mode (they can be sold that way as ‘strips’ by investment dealers). Yet their duration is already approaching their maturity, and fast, as interest rates decline. At today’s 30-year yield of 2.59%, the (‘modified’) duration is 20.68 years, so a further 10 basis point drop in rates will provide a gain of 2.1%; 0.25% will provide over 5.1% in capital gain. The less-than-current inflation coupon adds to the return.

For 10-year Treasuries, which yield just 1.5%, it is even more pronounced. Their duration is 9.22, less than a year from the maturity. A mere 5 basis point drop in rates gives a 0.46% price appreciation; 10 basis points gives over 0.9%; a 0.25% drop in yield will give 2.3%. As in the case of 30-year Treasuries, these gains dwarf the actual coupon yield, and are most of the total return to the investor.

So, investors — including banks, pension funds, hedge funds, and even ordinary individuals and corporations — have made huge gains in very secure fixed-income paper, backed in full by the U.S. federal government with no chance of not being paid back, even if it is with devalued. It’s excess money created by the Federal Reserve.

This has been going on for decades, but with some important — and unpleasant – interruptions, as interest rates occasionally spiked. However, the last few years, since the financial crisis led to the demise of many U.S. financial institutions, are the most dramatic in sheer magnitude of the money at stake and the returns that have been earned.

Motivations and Causes of Bond Buying

While some of the market participants may have been prescient enough to realize that rates could go very low and thus generate huge returns for bonds, even on a before-risk-adjusted basis, it seems likelier that the motivations are diverse, and have changed over the past four or five years.

Bonds As a Safe Alternative in Bad Economy, Uncertainty

The first impulse to buy bonds was that of safety. As financial institutions became suspect, and the global economy turned sour, the only assuredly safe place to put portfolio funds was in bonds.

Federal Reserves Buys Bonds, Lowering Rates

The second motivation was the Federal Reserve’s willingness to provide liquidity, and then purchase U.S. Treasury and other bonds, including mortgage-backed securities, in a program called ‘Quantitative Easing,’ which occurred in two programs, ‘QE One’ and ‘QE Two,’ and continues today in purchases of long-dated maturities in the program called ‘Operation Twist.’

The third reason interest rates on bonds have fallen is that banks, in the U.S. and abroad, are finding it difficult to lend, and demand for loans by customers is weak, because economic growth is slow in most large economies, so the need for capital to expand is low, too.

Bank Regulation Changes, Treasury Buying Induced

The fourth reason interest rates remain low is that those same banks have had greater restrictions placed on the quality of their assets, quality which is risk-based. U.S. Treasuries are considered risk-free (in a repayment sense), and do not require the banks to shore up their capital reserves, because those securities actually qualify as capital reserves.

Sovereign Debt Crisis Makes U.S. Preferred Bond Investor Destination

The fifth reason rates have declined is the sovereign debt crisis. Many national governments in Europe have experienced difficulty paying expenses with tax revenue as of the recession, and were unable to increase their borrowing to accommodate their social welfare and bank bailout obligations. Most of these nations use the Euro, so they were unable, unlike the U.S., the U.K., Canada and Japan, to let their own currencies take part of the financial burden away by devaluing, as they had in the past.

Several of these countries, principally Ireland, Greece and Spain, had bank-debt-fueled real estate bubbles which had burst, leaving bad loans on the books of banks, mass unemployment and even lower tax revenues, plus higher social welfare expenses.

Rates had to come down in Euroland, and they have, but the Euro itself has only slowly, erratically gone down in value. What lowered U.S. rates, which might have been expected to rise to close part of the gap between Treasury and Greek and Spanish rates, was the dramatic drop in bond investment in Europe in favor of the less unattractive environment of the United States.

While the U.S. fiscal situation has not been good for some time, the damage to banks had been contained by 2009, and economic growth, although weak, had resumed in that year. The European sovereign debt crisis has only gotten worse, so U.S. and foreign investors have continued to move money to North America.

Since the Treasury market is the biggest and most liquid in the world, it remains the primary destination, although Switzerland and Denmark have also benefited to the point where they can now sell bonds with negative interest rates. Canada and Australia do not have deficit, debt, growth, or solvency problems, but their economies and currencies are subject to the whims of commodity markets, and their market size is not large enough for big investors. The Japanese bond market is huge, but yields are low, and the country’s fiscal outlook is bleak.

Slower Economic Growth Helps Bonds

The sixth reason bonds have performed well, and may continue to do so, is that, starting in 2011, it looked like economic growth, worldwide, was slowing down. This was partly due to government stimulus measures in developed economies winding down, partly to the European crisis, partly to China’s efforts to cool its own overheated and construction-dominated economy, and partly to escalating energy prices dampening consumer spending. All of these trends have persisted this year, although oil prices have eased of late.

Recent U.S., Global Weakness Makes Bonds Outshine Stocks

The seventh reason bonds have shone so brightly is related to the sixth reason. Stock markets began to falter last year as economic growth began to slow, and the outlook deteriorated further. Share prices move with corporate profits, which cannot grow much if consumers and businesses are not experiencing growth in income. Corporations have become more cautious, and are not spending much in capital investment for renewal or expansion.

Another reason they are cautious is political, tax and regulatory uncertainty, especially in the United States. That uncertainty will continue until the Presidential election and likely beyond, as several issues will remain no matter who wins control of the White House, Senate or House of Representatives. So, bond markets have looked better than stock markets, which could give negative returns if profits decline or stagnate, or if they look like they will do so, and for a prolonged period.

Bond Buying as a Winning, Profitable, Continued Strategy

The eighth and final reason that interest rates have declined so much is that some investors and speculators are betting that they will continue to do so; this is a self-fulfilling, and self-reinforcing prophecy, one that has done so well for them for four years now, and one that experienced, highly technically adept and quick market experts can ride for some time to come, and get out of quickly when it ceases to work for them.

It is, for them, another profitable bubble, whether or not they are willing to consciously and explicitly admit it to themselves. Also, as duration has increased as rates have fallen further, the rate of decline in interest rates, as I showed earlier, does not have to be as great for them to experience large gains. The Federal Reserve is a willing, indirect accomplice in aiding this process, since it helps accomplish their aim of suppressing long-term interest rates despite those rates now becoming negative in real terms; i.e., after inflation. This process is called ‘financial repression.’

Leverage, Abetted by the Fed, Amplifies Returns, Return on Capital

These sophisticated investors also have another tool at their disposal, which magnify their gains: Leverage. They can borrow at very low short term rates, at a small premium above that of the U.S. federal government itself, putting only a fraction of their own capital at risk, since their collateral is high quality government debt.

The return on capital they have been getting is enormous. This can continue for quite some time further. Observers such as myself thought that this would have ended long before now, but as with all bubbles, the old adage regarding short-selling goes, ‘Markets can be wrong longer than you can remain solvent.’

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