88/ "The core of the risk management is evaluating the risk of each...

"Through the chaos of 2008 and 2009, our volatility remained very near our target level of 12%." (p. 155)
"Look where others don't. Adjust position sizes to overall risk to target a particular volatility. Pay careful attention to transaction costs." (p. 157)
Assuming winning and losing months are coin tosses, "the odds of getting at least one track record ≥ Thorp's would still be less than 1 out of 10^62. The odds of randomly selecting a specific atom in the earth would be about a trillion times better." (p. 162)
"They discussed various alternatives, including getting rid of me and breaking knees. Fortunately, they settled on changing the rules." (p. 180)
"Fortunately, one of the members on the abstract committee was a number theorist whom I had worked with." (p. 181)
"Something had fallen off to make the accelerator rod lock down." (p. 188)
Thorp: "I don't think so, because historically, ideas don't just appear in one place; they tend to appear in several at the same time." (p. 190)
A paper was published about this in 2011 (26 years later):
x.com/ReformedTrader…
"The biggest PC is the stock market. The returns went up, and the risk went way down." (p. 203)
"It worked but was risky enough that it was hard to stay with it." (p. 211)
2007 for Thorp; this came out 12 years later:
x.com/ReformedTrader…
"A 60-day lookback was best. Too short of a window, and you get a lot of noise; too long, and you get old information that isn't relevant.
"We also had a risk management process that worked a bit like the old portfolio insurance strategy." (p. 213)
"His organization didn't appear as counterparty on any of [the 10 trades that were checked]." (p. 216)
Schwager: Due to enormous contango, "it was possible to store oil on a tanker, hedge it by selling much higher-priced futures, and deliver it against the contract at expiration. The price difference far exceeded the costs of operating the tanker." (p. 224)
AQR generalizes this idea (carry) and applies it to a broad set of futures. They find that futures are worse forecasters than spot prices: in other words, carry works everywhere.
x.com/ReformedTrader…
"IV was 100 bps normalized... the market was assigning the odds of rates staying ≈8% as >4 SD event." (p. 235)
"We went to an exotic option dealer and asked them to price an outperformance option. XLP had to outperform the S&P,and the S&P had to be unchanged to higher." (p. 240)
Betting Against Beta (AQR):
papers.ssrn.com/sol3/papers.cf…
Schwager: So the dealers were deliberately mispricing the CDOs?
Mai: "Oh, yes. The buyers of CDOs...
"We asked, 'How could you issue a CDO at 70 bps that you are unwilling to assume the risk on at 300?' They said they would get back to us. Of course, they never did....
"We were concerned about the integrity of the financial system. We bought a ton of puts and CDS on Bear Stearns because we though they would go bankrupt." (p. 250)
"We love trades that are so close to their absolute limit tht they have tremendous asymmetry." (p. 252)
"We shut the [market-neutral equity] strategy down.... I was afraid of a lack of liquidity." (p. 271)
"Analysts and economists have big egos, which gets in the way of making money because they can never admit that they are wrong." (p. 278)
"80% of profits come from 20% of ideas." (p. 279)
"The two biggest mistakes traders make is that they don't do enough homework and are too casual about risk." (p. 282)
"When you have a business, you can't walk away. It becomes a prison, whereas being a trader was very free." (p. 307)
"You don't want to be sitting in front of your screen and staring at market prices for 12 hours a day; that won't tell you much. You will overprocess and overtrade.
"You will feel physical pain with every tick against you." (p. 311)
This sounds like a discretionary version of risk-adjusted momentum:
x.com/ReformedTrader…
"I said, 'Sell it now.' " (p. 313)
Impracticality of actual arbitrage made options available at arbitrage-like prices.
x.com/ReformedTrader…
"A number of great macro traders decided to branch into multistrategy funds. It didn't work too well in 2008 when they were all exposed." (p. 315)
"Really good traders are also capable of changing their minds in an instant. If you can't, you will get caught in a position and wiped out." (p. 316)
"I recognized in a moment of clarity that if I had reached a fever pitch in trying to buy at any price, the moment the market turned, it would just head straight down." (p. 316)
"In 2008, volatility quadrupled. I decided we should trade a fraction of what we used to. Most people didn't do that and got blown up." (p. 318)
Volatility targeting:
x.com/ReformedTrader…
"Never stop asking questions. Speak to as many people as you can. Research every opposing opinion.
"When everything lines up, swing for it because even if you're wrong, you probably won't be by much." (p. 318)
"The market is not about facts; it's about people's opinions and positions. Anything can be any price at any time. You need to have stops." (p. 318)
"If you interview a trader for an audit, they try to blind you with jargon: alphas, deltas, gammas...
"I hate failure, so I would make them take me through it. By doing that, I became fascinated by how markets work. Also, the 1% of traders who were smart were *really* smart." (p. 327)
"As I made more money, I got more and more confident, and I increased my position each time. Ultimately, I put on a position where I was completely wrong." (p.328)
"Because I had lost money that I never had in my hand, it didn't feel as bad.... In another two days, I would have lost it all." (p. 329)
"Although I was disgusted by Russia at the time, I had been willing to stay in it...
"What I did was to be a bit underweight in Russia...
"I was right to start selling that day because the spell created by the senseless bull market had been broken by the previous day's collapse....
"Being dogmatic is why a lot of hedge funds who did brilliantly in 2008 because they were short then blew up in 2009." (p. 341)
People don't diversify; they can't handle being different:
x.com/GestaltU/statu…
"The high volatility leads to managers making poor investment decisions, such as panicking out of positions near the bottom and jumping in near the top.
"The composition of the emerging market
"Emerging markets behave more irrationally than any other because a large proportion of participants are retail investors." (p. 345)
"Clients are not looking at relative performance. If the index is up 10%/year and the advisor is up 6%/year, they are just looking at being up." (p. 346)
"It is much more difficult for a foreign firm to get government
Robeco looked at the long and short legs of factors and found that the short leg has no alpha after controlling for the long leg:
x.com/ReformedTrader…
"I calculated that by saving 2/3 of my income and investing at 10%/yr, I could be a millionaire by the time I was 53." (p.362)
x.com/ReformedTrader…
"The fundamental underpinnings were completely different from the way it was priced." (p. 364)
"But if you have only a three-month horizon, anything can happen." (p. 366)
Regardless of 1999, "I would short these types of stocks again because 99x/100, I am going to make money." (p. 375)
Schwager: "It's not a matter of whether you won or lost, but whether you would make the same decision again." (p. 375)
As a stockbroker, "I didn't know anything. I was probably dangerous to my customers. I was literally following the firm's research, but if you work for a firm that has bad ideas, you don't have a chance." (p. 388)