Irving Kahn: 109 years old, 86 years investing
Irving Kahn started working on Wall Street in 1928.
He died in 2015, while listening to his grandson read him the financial news.
86 years of continuous work. 109 years of life. No heart disease, no cancer, no diabetes, no dementia.
No investor in history has had a time horizon like Irving Kahn's.
He left college because he wanted to learn something deeper
Irving Kahn was born in Manhattan in 1905 to Polish Jewish immigrants. He entered City College of New York to study economics and business, then quit after two years. Not out of boredom, but because the school had no course on security analysis, the thing he actually wanted to learn.
He found his way to Columbia Business School. And there he met Benjamin Graham.
In 1928, aged 23, Kahn became Graham's second teaching assistant at Columbia. For the next six years he rode the subway with Graham from Manhattan up to Columbia every week. The ideas exchanged on those rides shaped the remaining 86 years of his career.
Kahn also contributed research to Security Analysis, the book regarded as the bible of value investing, published in 1934. In the same class sat a young student named Warren Buffett. Later, both Kahn and Buffett gave a son the middle name "Graham", in the teacher's honour.
1929: shorting Magma Copper with $300, and a 23-year-old's reasoning
In the summer of 1929, Kahn, 23, was a runner on the NYSE floor. He watched traders around him borrowing to speculate, buying sight unseen, gambling. He had already seen the Florida real estate bubble of 1925–26 burst.
He borrowed $300 from his brother-in-law to short Magma Copper. His reasoning was simple: he had read the history of market cycles, knew copper was a volatile industry, and saw the share price far above the fundamentals.
His brother-in-law said: "You will lose it all, the market is going up."
In October 1929 the market crashed. The $300 became nearly $900.
That was the first trade of his life. And almost the only short. Over the remaining 86 years Kahn was essentially always long-only, because he had learned the basic lesson: timing the market is harder than timing value. He got lucky in 1929. He did not want to depend on luck.
The Depression, and how frugality saved an investor's life
During the Depression, Kahn and his wife Ruth lived in public housing on the Lower East Side. His salary fell to $60 a week. He walked home for lunch with his wife and children to save restaurant money.
The children thought he was rich because he always came home mid-day. In fact he was saving every cent.
When his boss asked "Why do you look so cheerful?", Kahn answered: "I thought you were going to fire me."
While other bankers feared losing their jobs, Kahn was happy to still have one. That is the psychology of someone with low personal costs: a low baseline means high happiness. And nobody gets forced into selling at the bottom.
Founding a firm at 73
In 1978, aged 73, Kahn founded Kahn Brothers with his sons Thomas and Alan. The family name on the door. Multi-generational. Built to last.
When most people had retired, Kahn was starting. Because for the first time he could apply Graham's philosophy in its pure form, without working for anyone else. His grandson Andrew joined later; three generations in the same office, suite 1303 at 555 Madison Avenue.
At its peak Kahn Brothers managed more than $1 billion. The top ten positions were 78% of the portfolio. Not Schloss's hundred stocks, but high concentration with conviction.
The philosophy: an investor's two jobs
The most important thing Kahn ever said:
"The investor's first job is to preserve capital. Having done that, they can turn to the second job: seeking a return on that capital."
Most investors reverse the order. They think about return first and risk second. That is why they fail.
From Graham, Kahn took the idea of a margin of safety: buy a dollar for fifty cents. Not to make money quickly, but to have room when you are wrong. He applied it unchanged for 86 years.
The other rules he lived by: when investors flee, he bought. Human instinct is precisely wrong for markets, wanting more when prices rise and wanting out when they fall; you have to resist the instinct. Every investment needs three to five years to bear fruit. Hold 50% cash as ammunition for opportunities. Know more than the seller; that is the real edge. And turn off financial television, which is noise, not signal.
Living to 109, and staying well
Three of Kahn's siblings also lived past 100. The family was studied by the Longevity Genes Project at Albert Einstein College of Medicine. They met the definition of "SuperAgers": people who reach 95 without cardiovascular disease, cancer, diabetes or dementia.
Genetics played a large part. But so did a frugal, low-stress life, pleasure taken in the work, constant mental engagement, a simple consistent diet, and never retiring.
At 97 he said: "I get a great deal of pleasure from finding a cheap stock." He still did research in the evenings and at weekends. Three days a week he took a taxi from his Manhattan apartment to the office, well past 100.
After his wife Ruth died, following 65 years of marriage, he did not retreat into grief. He said: "I could not find another person or another profession with as much interest for me as economics." Work was not a job to him. It was life.
The QuietVC lesson
Irving Kahn was not the biggest billionaire. His net worth at death was a few hundred million, not Buffett's $100 billion. But he had something Buffett does not: 86 years of working life, 109 years of good health, and peace of mind to the last moment.
First, a long time horizon creates everything. 86 years of work. If you start today and work until 80, you have 35 to 40 years ahead. That is enough time for real compounding, so long as you do not wreck it with psychological mistakes or leverage.
Second, frugality is compounding applied to life. Kahn walked home for lunch through the Depression. Took taxis rather than keeping a car at 100. Ate the same dish at the same restaurant for years. Every dong not spent is a dong at work, and when the crisis comes, nobody has to sell under personal financial pressure.
Third, the family name on the door is a real long-term commitment. Kahn Brothers: father to sons to grandson. 47 years by the time he died. Still operating. When your name is on every decision, you cannot not care.
Fourth, enjoying the work is the longevity secret. Kahn did not retire because he did not want to. Not because he needed the money. Because finding a cheap stock brought him joy. When work is the pleasure, there is no reason to stop.
Over 109 years, Kahn learned from Graham, lived in public housing, walked home for lunch with his wife, wrote part of Security Analysis, loved his wife for 65 years, founded a firm at 73, found joy in cheap stocks at 97, and was listening to financial news when he died.
That is not a career. That is a life.
Silent discipline. Compound value.