September 12, 2019
In the quest to become a savvy investor, one of the most important concepts you must understand is that of the business cycle. This periodic ebb and flow of our economy exerts tremendous influence not just on asset prices, but on everything from interest rates to the availability of jobs.
Recognizing where we are in a particular cycle will not only help you determine how to position your investments, it can help you with critical decisions such as whether it’s a good time to purchase a home, change jobs, or even start a business. In short, nearly every aspect of your financial life will be influenced in some way by the business cycle, so it pays to have a basic conceptual understanding.What’s the Business Cycle?
The business cycle refers to alternating periods of expansion and contraction within the economy. It’s sometimes referred to as the economic cycle or the boom-and-bust cycle. All free-market economies exhibit this type of behavior.
Whenever we talk about growth (expansion or contraction) of an economy, we’re referring to changes in the output of that economy. There are a variety of ways to measure output, but the metric that is most commonly used is real gross domestic product (GDP).Gross domestic product measures the total amount of goods and services produced within a particular country over a certain time frame. When an economy is expanding, the amount of goods and services being produced is rising. During a contraction (or recession), the amount of goods and services being produced is falling.
One key distinction to be aware of when talking about gross domestic product is the difference between nominal GDP and real GDP. Since GDP is measured in terms of dollars, its value is subject to the effects of inflation. Nominal GDP refers to the value of goods and services produced using today’s dollars. Real GDP, on the other hand, is calculated by taking nominal GDP and removing the effects of inflation.
Stripping out inflation allows for a more “apples to apples” comparison of the changes in output. It provides us with a much better read on whether the economy is truly expanding or contracting.
As a result of constantly rising populations and improvements in productivity (think technology), economies have a natural tendency to expand over time. However, they do not grow at a constant rate. Instead, we see periods of rapid economic growth that are interspersed with periods of both slowing growth, and times when the economy will actually shrink.
You can see how this all plays out in the chart below. The vertical axis measures output (the size of the economy) while the horizontal axis measures time. The “Growth Trend” line depicts the long-term average growth of the economy. As mentioned earlier, this line slopes up because nearly all economies expand over the long-run.
The gray dashed line represents the actual growth of the economy. As you can see, there are periods of rapid growth (expansion) followed by a peak at which output is at its highest. Subsequently, the economy begins to contract and output begins to fall.
The expansion phase of the business cycle is the entire period from one trough (the lowest level of economic output) to the following peak (highest level of output). The contraction phase is the period from one peak to the following trough. These alternating periods of expansion and contraction occur with relative frequency. Since 1854, the U.S. economy has experienced 33 cycles of expansions and contractions. It’s inevitable that we will experience many more.
Calling the business cycle a “cycle” is a bit of a misnomer because periods of expansion and contraction do not happen with any sense of regularity. We know that a period of rapid expansion will be followed by a contraction, but we do not know how long each expansion will last, or when the inevitable contraction will occur.
When a contraction, or recession, does hit, we also do not know long it will take for the economy to recover and begin growing again. Historically, expansions have lasted an average of 39 months, while recessions have lasted an average of 18 months. In recent times, the length of economic expansions has been increasing (averaging 58 months since 1945), while recessions have been falling in length (averaging just 11 months since 1945).
At this point, you may be wondering what criteria is used to make the determination that the economy is officially in a recession. The financial press and many others will tell you that we’re in a recession when the economy experiences two consecutive quarters of declining real Gross Domestic Product (GDP). In most cases, a recession will encompass two or more quarters of declining real GDP, but this definition is not entirely accurate.
In the US, the task of identifying and dating recessions falls on the National Bureau of Economic Research (NBER). The NBER is generally seen as the authority on dating recessions, and there is near universal reliance on the determinations made by the NBER. Businesses, policy makers, academics, economists and many others typically defer to the NBER for dating a recession’s onset and end. As a general rule, the NBER tries to identify a month when the economy reached a peak of economic activity, and then a subsequent month when the economy reached a trough – a bottoming of economic activity. The time period in between, during which economic activity is contracting, is defined as the recessionary period. After the trough, the economy moves back into a period of expansion. It’s important to realize from this approach that a recession, as defined by the NBER, is not a period of diminished economic activity, but a period of diminishing activity. Said differently, it’s the business cycle contraction that we discussed above.
Now that you understand the different phases of the business cycle, it helps to know how some of the major financial variables move during each phase.
Based on these factors, it should be clear that the best time for most financial endeavors (buying a home, starting a business, finding a new job) is in the early or mid-stages of an economic expansion. Pursuing these goals near the peak (end) of an expansion, or during a recession, will lead to less than satisfactory results.
At this point, it should go without saying that how you manage your investment portfolio with respect to the business cycle is extremely important. However, this is not nearly as difficult as it may seem. There’s really just one main overarching concept to grasp: Invest primarily in stocks during expansions, and bonds during contractions.
When the economy is expanding, it means that companies are able to produce and sell more goods and services. This drives increases in both revenues and earnings, and as a result, makes each share of stock more valuable.
During these periods, however, the increases in overall demand often cause interest rates to rise. Since bond prices are inversely related to interest rates, this means that bond prices typically fall when the economy is growing. As a result, bonds tend to act as a performance drag during economic expansions.
When the economy inevitably rolls over and begins to contract (we go into recession), this dynamic reverses. During these unruly periods, stocks generally lose a lot of value while bond prices rise.
As a result, the best thing you can do from an investment perspective is to invest primarily in stocks during economic expansions, and transition your portfolio towards bonds as the economy begins to roll over. Once the recession is over and the economy begins to expand, stocks once again become the preferred asset class.
Shifting your portfolio in this manner will allow you to take advantage of whichever way the economic winds are blowing, and maximize returns throughout each portion of the business cycle.
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