The Margin Debt Time Bomb

 | Sep 06, 2015 07:50AM ET

What is perhaps the greatest risk to individual investors these days?

Is it the potential for a decline in corporate earnings based on a slowing global economy? Is it that current valuation levels in both equities and fixed income instruments are much nearer historic highs than not? Is the biggest risk a US Fed that will soon raise interest rates for the first time in close to a decade?

Although all of these are specific investment risks we face in the current cycle, my contention is that the single largest risk to investors is a risk that has been present since the beginning of what we have come to know as modern financial markets. The single largest risk to investors is themselves. By that, I mean the influence of human emotion and psychology in decision making.

h3 We Are Our Own Worst Enemies/h3

After many years of managing through market cycles, it seems pretty clear to me that humans are uniquely wired incorrectly for long-term investment success. When asset prices double, we want those assets twice as bad. When asset prices drop in half, we want nothing to do with them. Isn’t this exactly what we saw in US residential real estate markets a decade ago? Isn’t this what we experienced with the rise in dot-com stocks in 1999 and their demise over the three following years? Human decision making shapes the rhythmic bull and bear market character of asset prices. We know the two most prominent emotions that drive markets higher and lower are those of fear and greed.

If we turn the clock back far enough in early human history, we know that humans ran in packs. Strength and protection was found in a pack or herd. It was when humans ventured away from the protection of the herd (consensus thinking) that they were physically vulnerable. The fight or flight mechanism has been an integral part of human development over time. Several thousands of years later, these learned decision making responses are simply hard to “turn off.” We find comfort in decision making within the herd. When confronted with challenge, it’s either fight or flight. These ingrained human character traits are why we often see investors buy much nearer a top and sell close to market bottoms. Decision making driven by emotion, as opposed to logic, is the single greatest impediment to long term investment success. There is an old saying in the markets: “Human decision making never changes, only the wallets do.”

h3 Human Emotions Meet Animal Spirits/h3

Just what does this have to do with decision making in the current environment? Remember, as investors, controlling our emotions is probably the single greatest obstacle to sound decision making. As such, we need to anticipate potential emotional triggers so we can better confront and allay our own human responses to market outcomes. There is probably no greater human emotional trigger than actual price volatility itself. If we can anticipate and understand why price volatility may occur, we hope to dampen our own emotions and objectively steer through the vagaries of market cycles.

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What we are seeing in the current market environment as a catalyst for potential heightened forward market price volatility is the current level of NYSE margin debt outstanding. You may be familiar with the financial market characterization of “animal spirits.” The concept of “animal spirits” is integrally intertwined with human emotion, in this case meaningfully heightened confidence. There probably is no greater show of human confidence in the investment markets than borrowing to fund an investment. Certainly, leveraged investors expect a return above their cost of capital, with expectations usually much higher than just this simple metric. The direction and level of margin debt outstanding at any time is a reflection of these so called “animal spirits,” it is a reflection of human confidence.

h3 The Margin Debt Time Bomb/h3

Let’s have a look at where we now stand. As of July month end, NYSE margin debt outstanding stood just below a record level of $500 billion. It hit a new all-time high right alongside the equity market itself, exactly in line with what we would expect in terms of the emotional side of human decision making.