The New York Stock Exchange publishes end-of-month data for margin debt on the NYXdata website, where we can also find historical data back to 1959. Let's examine the numbers and study the relationship between margin debt and the market, using the S&P 500 as the surrogate for the latter.
The first chart shows the two series in real terms — adjusted for inflation to the current dollar using the Consumer Price Index as the deflator. I picked 1995 as an arbitrary start date. We were well into the Boomer Bull Market that began in 1982 and approaching the start of the Tech Bubble that shaped investor sentiment during the second half of the decade. The astonishing surge in leverage in late 1999 peaked in March 2000, the same month that the S&P 500 hit its real all-time high. A similar surge began in 2006, peaking in July, 2007, three months before the market peak.
The next chart shows the percentage growth of the two data series from the same 1995 starting date, again based on real (inflation-adjusted) data. Margin debt grew at a rate comparable to the market from 1995 to late summer of 2000 before soaring into the stratosphere. The two synchronized in their rate of contraction in early 2001. But with recovery after the Tech Crash, margin debt gradually returned to a growth rate closer to its former self in the second half of the 1990s rather than the more restrained real growth of the S&P 500. But by September of 2006, margin again went ballistic. It finally peaked in the summer of 2007, about three months before the market.
After the market low of 2009, margin debt again went on a tear until the contraction in late spring of 2010. The summer doldrums promptly ended when Chairman Bernanke hinted of more quantitative easing in his August 27th Jackson Hole speech. The appetite for margin instantly returned.
Unfortunately, the NYSE margin debt data is a few weeks old when it is published. In nominal terms, margin debt at the end of June, the latest available data, has declined for the second consecutive month — down 1.7% in May and 3.0% in June.
NYSE Investor Credit
Lance Roberts, General Partner & CEO of Streettalk Advisors, analyzes margin debt in the larger context that includes free cash accounts and credit balances in margin accounts. Essentially, he calculates the Credit Balance as the sum of Free Credit Cash Accounts and Credit Balances in Margin Accounts minus Margin Debt. The chart below illustrates the mathematics of Credit Balance with an overlay of the S&P 500.
As I pointed out earlier, the NYSE margin debt data is a several weeks old when it is published. Thus, even though it may in theory be a leading indicator, a major shift in margin debt isn't be immediately evident. Nevertheless, we see that the troughs in the monthly net credit balance preceded peaks in the monthly S&P 500 closes by six months in 2000 and four months in 2007. The latest trough occurred in March, four months ago.
There are too few peak/trough episodes in in this overlay series to take the March credit-balance trough as an urgent warning for U.S. equities. But I'll certainly revisit this topic on a regular basis, at least for the next several months.
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