1/ Taking a break from options to talk about a general trading concept.
Intended audience: people who are getting into trading, people have read a bunch of “experts” and came away even more confused, etc.
A thread…
2/ I thought about putting this in the book, but in the end I decided it’s too technical for a general audience. The one sentence claim I make here is:
“Trading is the wrong term for what trading is. Trading is more accurately called positioning.”
3/ What do I mean by this?
Retail traders seem to obsess about “entries” and “exits”. But in my career as a trader, I *never thought about entries and exits. At least, not explicitly.
2/ I wasn’t sure if I should keep going. We’re getting closer to “how to make money in options,” and I think public sources of such claims are always and invariably scams.
But I’ve decided this is still more “useful information to know” than trading edge, so it should be ok.
3/ Let’s start by talking about time. Time is surprisingly hard to think about. But why do we care?
Well, as we said in Options 101, we want to convert our options prices into vols because of #reasons. And to do so, you need to know t_exp.
More ruminations on what trading can teach us about non-trading things. A thread...
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Recently reading @SinclairEuan's excellent "Positional Option Trading", and he reminded me of something I hadn't thought about for a while:
Great trades start with a known risk premium and then add idiosyncratic inefficiencies on top to get more alpha.
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The risk premium is a long-term thing. The vol premium or the carry trade aren't going anywhere.
But you can't really build a business on them alone. Too many people know about it, so returns are at best "ok" (i.e. low Sharpe) but with terrible tail behavior under stress.
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When you teach options, they put you in jail if you don't start with this:
A call/put is the right (but not the obligation) to buy/sell a security for a given price at (or by) a certain time. Boring! Let's do an example:
2/ If I own the Mar 700 call in $TSLA then that means anytime before ~5pm on Mar 19 2021, I can exercise my right to buy TSLA shares.
I hand over $700/share and I get some TSLA stock. First let's note a few things:
3/ US equity multipliers are typically 100 (barring corporate actions). So when you buy 1 options contract (call or put), you're actually buying the right to 100 shares.
Remind me to tell you the story of when I messed up the DAX multiplier. I was *sure* was going to get fired.
Many different-seeming activities have a very similar characteristic when you compare skilled people to world-class people:
Almost all of the difference can be explained by the quality of left tail performance.
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1. In golf, @LouStagner and @scottfawcett have shown that scratch player vs professional "good shots" are fairly similar (within a few %), but the bad shots are sometimes 2x worse for scratch players vs pros.
And scratch players are really good at golf.
2. In chess, a big part of your ELO is how often and big your blunders are. The difference between an IM and world-class GM isn't that @GMHikaru finds brilliancies much more often, it's that his worst plays are still really good.