| Edward I. Altman |
Induction of Edward I. Altman Inducted November, 2001
Altman has forgone the material rewards of the nonacademic worldThe excellence that Ed has brought to the classroom is an inevitable consequence of the high standard he sets for himself. This intensity also manifests itself in a strong competitive drive, particularly on the baseball diamond. At the Stern School, the claim that Ed was hired primarily because the departmental softball team needed a shortstop, and it was discovered only later that he could also teach finance. Practitioners were not initially well-disposed to quantitative methodsWell before that time, I had heard of some Z-scores published by a professor at New York University. That’s not to say that I had actually read his work, which is about the last thing a practitioner was likely to do in those days. The more typical response to development of a quantitative tool for credit analysis was to regard it as a threat. Analysts reasoned that if management found out that it was possible to predict defaults or rating changes with a statistical formula, they’d fire all the analysts and replace them with a computer program. In reality, these concerns were not well-founded. Nevertheless, corporate bond analysts regarded it as their mission to disparage the work of the ivory tower eggheads. They had to educate management about the failure of quantitative methods to capture credit risk in all its rich, qualitative subtlety. The bottom line is that what I had heard about Z-scores was not especially complimentary. And to the extent that I had my own ideas on the subject, I wasn’t too enthusiastic about quantitative approaches. For me, the whole appeal of credit risk lay in the unsystematic elements that created opportunities precisely because they were hard to model and, therefore, required people to think outside the box. Altman has put his mission above politickingAmong the things that makes Ed Altman special, though, is that he’s an open and honest person. He has a sense of mission, which he puts ahead of petty politics. Instead of positioning himself for a turf battle, Ed quickly got me involved in his study of the high yield market. It turned out that our work was highly complementary. And once I got a first-hand look at his ZETA analysis, as opposed to the caricature presented by people who were innately hostile to the concept, I saw that it genuinely represented a great advance in the field. One problem I had previously encountered in credit analysis was assessing the risk of an issuer with some good statistics and some bad statistics. For example, suppose that a company had comparatively good fixed charge coverage within its industry or rating peer group, but also had a comparatively weak capital structure. What was an analyst supposed to do — arbitrarily assign coverage a weight of two and leverage a weight of one? The correct answer is what Ed’s analysis did, which was to test the data against actual default experience and let the weightings be assigned by the outcome. Z-scores enhanced fundamental analysts’ ability to gauge default riskSeen in the proper light, Z-scores were not a threat to credit analysts’ jobs, but a conceptual insight that enabled them to do their jobs better. Institutions were not about to start managing their corporate bond portfolios entirely on the basis of a quantitative model. They needed humans to assess the many contingencies that no model could capture. And the institutions had to have analysts checking the quality of the numbers that went into the analysis. They understood that some issuers would manipulate their financial reporting to make themselves look good under whatever system investors set up. But at the same time, the analysts had to put rigor into their work by demonstrating that there was an empirical connection between the ratios they were calculating and the probability that a company would meet its obligations. Establishing that link was the true significance of Altman’s breakthrough. Ed’s pioneering research in modeling bankruptcy risk made him the logical candidate to inject some rigor into analysis of high yield bonds, when that sector began to develop as an institutional market in the 1980s. He proceeded to fulfill that role, but it was no tea party. At the time, high yield bonds were caught up in the controversy surrounding hostile takeovers and corporate restructuring. The financial press, always looking for new forms of financial hanky-panky to uncover, saw so-called junk bonds as a mire of disinformation and deception. He calls them as he sees themIn this highly charged environment, you can guess what happened when Altman’s very rigorous calculations produced a slightly higher annual default rate than the promoters of high yield bonds had previously reported. The press used his findings as a club to beat the brokerage firms, who did not necessarily want that much rigor. Up went the cry from Wall Street: “Couldn’t you try to be a little more positive, Dr. Altman?” “Surely, Dr. Altman, you have enough imagination to find a way to make the numbers better than they really are?” A few years later, another group of academics published a study that looked at the default data from a different angle. The usual way of thinking about the question 1. How much speculative grade debt existed at the beginning of the year? Journalists’ shocking revelations: 3 x 11 = 33This led to a discovery that the financial press considered monumental. That discovery was that 3 times 11 equals 33. If you count defaults over eleven years instead of over one year, the rate (are you ready for this?) is ELEVEN TIMES AS HIGH. Whoa! This is Nobel material. The next thing we knew, the press was reporting that a remarkable new study disproved Altman’s claim that the default rate on those evil junk bonds was only 3 percent. Actually, according to the crusading journalists, the rate was more than ten times as high as that! Barron’s exposed the exposé as a colossal errorWithin the week, Barron’s unmasked this supposed exposé as a colossal error. The new study’s 30 percent-plus rate was not comparable to Altman’s 3 percent rate in any way,> shape, or form. It was just a different way of looking at the same data. And on top of that, Altman himself had already looked at the data in this alternative manner, calculating a cumulative default rate in the neighborhood of 30 percent. He called this figure the “mortality rate.” It’s impossible to err in both directions at the same timeNone of this swayed the reporters. They were convinced that they had stumbled onto a new Watergate scandal. I said to them, “A few years ago, you were reporting that Altman was overstating the default rate. Now you say he’s UNDERstating it. Which is it? It can’t be both.” Logic had no impact, however. The latter-day Woodward-and-Bernsteins had their story and they were going to stick with it, come hell, high water, or the unwelcome intrusion of reality. The Willie Mays of bankruptcy predictionYour sturdy hands are swelled by calluses |