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fractionalhare

2,196 karma · joined June 28, 2020

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fractionalhare··on Game Stopped? (Live congressional hearing on GameStop)
I am loving Waters' slap down of Tenev. Tenev refuses to give her the honest answer: Robinhood did have a liquidity problem.
fractionalhare··on ‘Roaring Kitty’ Sued for Securities Fraud over GameStop Rise
I think it might be even simpler than that - "Roaring Kitty" is printable in a mainstream news publication, "DeepFuckingValue" is not :)
fractionalhare··on ‘Roaring Kitty’ Sued for Securities Fraud over GameStop Rise
No you do have risk, it's just defined. The risk is equal to the collateral, which "covers" you in the event you're "called." This means the price of the underlying has reached the strike price of the option contract, and the counterparty has exercised (as they almost certainly would). Then you are obligated to provide 100 shares of the underlying * the number of calls sold to the counterparty. If that occurs, you lose money - the amount of money you can lose is your risk. In the case of selling covered calls it's capped to the value of your collateral, but it's still risk.
fractionalhare··on ‘Roaring Kitty’ Sued for Securities Fraud over GameStop Rise
I guess you're probably talking about Universa, which Taleb is closely affiliated with? Taleb also ran his own shop Empirica for five years, 2000 - 2005. It beat the market on an absolute basis in year one (incidentally, during the dotcom crash) then had mostly negative results all other years.

I don't specialize in derivatives so I can't speak to how compelling his industry work is versus his writing. But my understanding is Taleb's strategies were explicitly designed to lose small amounts of money often and win huge amounts of money occasionally.

The idea is basically to go long vega and gamma waiting for an apparently rare event you believe will happen somewhat more frequently than expected. In the meantime you'll eat the theta and usually lose money, but ideally within certain risk parameters.

fractionalhare··on ‘Roaring Kitty’ Sued for Securities Fraud over GameStop Rise
Yes. The initial cost of the trade is a credit equal to the price per call multiplied by the number of calls you sold. This is the maximum you can make. Your risk on the other hand is theoretically unlimited, because the price of the underlying is theoretically uncapped.

That's when you sell a naked call. If you instead sell a covered call, you keep 100 * the number of calls sold in your account as collateral. Then you still only receive an exact credit at the time the position opens, but your risk is capped and defined as the price of the collateral at the time the position opened.

fractionalhare··on What went wrong with the Texas power grid?
I don't think you can generalize American fireplaces. Every fireplace I've personally encountered has been traditional wood burning and absolutely heats up the room well past the time the fire is actually lit (American Northeast). I haven't actually been in a home with a gas-burning fireplace.

But more importantly - the gas fireplaces are intended to look nice with minimal effort. They are explicitly not intended to change the indoor climate much if at all. They're usually built in very new homes that have dedicated, reliable climate control systems or in cities that don't require much heating.

fractionalhare··on The Hazards of Asset Allocation in a Late-Stage Major Bubble
Why do you believe this is a predictive measure?
fractionalhare··on Why Databricks Is Winning
Interestingly, my team is actually moving off Databricks. I have anecdotally heard the same from other teams in the industry (buy side finance).

We found that notebook-based development is actually an antipattern for software engineering. It was ostensibly helpful for the narrower "data science" use case, but we have a much more robust ETL and research platform we built on our own using Pandas, Dask, Prefect and AWS.

And personally I hated writing code in notebooks. If you're attached to that, you can basically get the same thing by using PyCharm in scientific mode with cell execution.

fractionalhare··on Roaring Kitty to testify on GameStop alongside hedge fund managers
The hedge fund community isn't really homogenous that way. Basically all the long/short equity hedge funds with appreciable AUM lost significant money in January, because most of them were short the...well, obvious short candidates, like AMC, GME and BBBY. Other kinds of funds which trade on monentum or which shorted near the top tick made an absolute killing.

Personally I don't think it's unfair when any fund loses money - that's the game. I do think it's unfair Melvin in particular has outsized attention. The only reason Melvin is in the spotlight now is because the WSB zeitgeist just happened upon Melvin's public short and fixated on it without looking at other funds' 13Fs showing the same position. Melvin was far from the only fund short GME. This in turn led the media outlets to hyperfocus on Melvin, which has in turn led the mainstream lay community to hyperfocus on Melvin.

fractionalhare··on Why blockchain is not yet working (2018)
I'm not making normative statements about what's fair or not fair. There are legitimate and reasonable grounds for criticism of capital markets. I'm correcting your specific positive statements, which I quoted, because they're incorrect. I don't have anything to say about blockchain or the rest of your comment.
fractionalhare··on Why blockchain is not yet working (2018)
> Something like Melvin Capital shorting 138% of GMS's stock

It didn't short 138% of GME stock. GME short interest increased to 138% while Melvin and many other hedge funds were shorting it. Melvin didn't do that singlehandedly.

> Naked Short selling maybe technically illegal, but that is in name only and in continues unabated to this day, hell the SEC refused to look into this obvious collusion between various hedge funds (citadel/melvin/Steve Cohen)

There is no evidence these firms colluded or engaged in naked short selling. Naked short selling is when you sell short a security without first entering into a contract to borrow the security. Short interest is orthogonal to naked short selling.

fractionalhare··on Roaring Kitty to testify on GameStop alongside hedge fund managers
> People who act like they know a thing or two tend to get immediately jumped on, which I found quite refreshing. "But will a gamma squeeze happen?' is usually met with "stfu and go read a book rather than drop terms you don't understand."

Maybe this is how it was 6 million subscribers ago. Based on my (extensive) reading of WSB the past few weeks, this is no longer true.

I've read just about every WSB post (and its comments) about GME with over ~1000 upvotes. People asking when the gamma squeeze is going to happen were definitely not being told to read a book, they were being told things like "this Friday!" And people acting like they had intimate knowledge of this fact weren't exactly downvoted either...

fractionalhare··on Roaring Kitty to testify on GameStop alongside hedge fund managers
No that model of investing is still very much alive. It's the basis of every long/short equity hedge fund. The successful ones do it in a more sophisticated way with some additional quantitative and data-driven analysis. But it's essentially the same model.
fractionalhare··on Quest for Hollywood fame splits Redditors at heart of market frenzy
Wow, where did you find that screenshot? It completely changes the narrative of what happened. Why isn't this well known on the subreddit? The current mods (after the admins stepped in) keep saying they're the "good ones" and u/zjz is endorsing that.
fractionalhare··on Yandex said it caught an employee selling access to users' inboxes
Yeah. That could be resolved if the ML teams only had access to the aggregated, anonymized data or the output of the models. And if a privileged access token (for example, the one the model training flow ostensibly uses) is logged as querying specific subsets of the raw data or ferrying it out of band, that should throw an immediate alarm with an audit trail.
fractionalhare··on GameStop missed out on capitalizing on the Reddit rally
> If you have a 7 figure loss you most likely had at least 7 figures in the bank.. not really the typical "simple man".

I do not think this is usually the case on WSB, where people regularly show off trading on margin several times larger than their total account size :)

Even without margin, it's not uncommon to see people freely admitting they put everything they have into a single position (and mods happily verify it).

fractionalhare··on GameStop missed out on capitalizing on the Reddit rally
Quite a number of redditors lost a lot of money too. If you sorted by new on WSB last week when GME plummeted, you could see lots of posts with 5, 6 and even 7 figure losses.

Given that 6 million of the current 8.5 million WSB subscribers joined after GME popped, I think most retail investors probably lost money. At this point it's a minority who got in early and made a lot of money.

fractionalhare··on Harvard astronomer argues that alien vessel paid us a visit
> "These ideas that came to explain specific properties of 'Oumuamua always involve something that we have never seen before," said Loeb.

"If that's the direction we are taking, then why not contemplate an artificial origin?"

This reasoning seems strange to me. We discover new things in nature all the time. Why would we consider an artificial origin, when we're constantly revising our knowledge of the natural world?

fractionalhare··on In Defense of Finance
Maybe, but why wouldn't they find it convincing? Any one of the major banks literally controls at least an order of magnitude more money in the economy than Johnson and Johnson does. Market cap and valuation has nothing to do with capital that is controlled. The author doesn't do a good job of rebutting the idea that finance is incredibly powerful in society by focusing on what financial firms are technically worth if you discount their client liabilities.
fractionalhare··on In Defense of Finance
> And the finance industry isn’t even that rich. Johnson & Johnson is bigger than any bank in the world, why aren’t the rich and powerful in the pocket of Big Band-Aid?

Well, no. Maybe by market cap, but that isn't the important metric here. Power consists of what is controlled and stewarded, not just what is owned.

JnJ controls billions of dollars of capital. The largest banks control trillions of dollars of capital, each.

JnJ is core infrastructure for healthcare; banks are core infrastructure for everything that exists in the capitalist fabric of society.

Banks may not be that wealthy by ownership, but this isn't really the right lens for critically examining how much power they wield compared to other industries.

EDIT: To whoever downvoted me: this comment isn't a defense of finance. It's a statement of fact refuting one of the author's points.

fractionalhare··on Ask HN: What is the safest way to put an Email address on my website in 2021?
Oh yeah.
fractionalhare··on How to Win at the Stock Market by Being Lazy
Like I said, I agree that it's extremely hard to judge if someone has genuine ability before they exhibit the track record. I'm simply saying that once the track record is established, attributing it to chance alone doesn't really make sense mathematically speaking.
fractionalhare··on How to Win at the Stock Market by Being Lazy
History has not shown that. It is easy to say that people beat the market by chance, but you should actually try calculating how many standard deviations from the mean some of these track records are. There haven't been anywhere nearly enough hedge funds to justify the most consistent track records being due to chance alone.

For illustration: assume any given fund has returns which simply approximate a normal distribution; i.e. their returns are theoretically just noise. Then the chance of the fund achieving a 2 sigma return in any given year is about 2%. We can model the odds of such a firm consistently exhibiting a 2 sigma return for 20 years in a row using a binomial distribution with n = 20 trials, k = 20 successes and success probability p = 0.02. Then we have

binom(20, 20) * 0.02^20 * 0.8^0 = 1x10^-34

There are firms which have consistently beaten the market by a significant margin for that long. Even if you relax the constraint to 10 years, you still get "only" 1x10^-17. At a certain point this becomes similar to saying that Steph Curry isn't actually good at basketball, all of his 3 point throws are just the expected outcome of lots of mediocre players existing who didn't make it to the NBA.

I do agree that retail investors should just invest in index funds though. And I agree it's extremely difficult to determine who has the genuine skill to beat the market before they've beaten it for so long that they're no longer accepting money.

fractionalhare··on How to Win at the Stock Market by Being Lazy
Just an aside: the first scenario you suggest, in which you have a 1% chance to 1000x your money and a 99% chance to lose it all, has an expected value of 10. It is absolutely rational to make that bet if you have enough capital to withstand a drawdown of let's say, 5x your initial bet.

For example, suppose you model this as a game with the following rules:

- you start with $1,000,000

- each turn you may bet $10,000

- if you bet, you roll a d100

- if you roll a 1, you earn 1000x your bet, if you roll anything else you lose your entire bet

- the game ends after 1000 turns or you lose all your money, whichever happens first

If you bet every turn, on average you'll end the game with approximately $60,000,000.

EDIT: Did you edit your comment to be 100x or did I misread? Oh well, leaving this here for posterity. If the win outcome is 100x, the EV is still 1.

fractionalhare··on AMC, GameStop Give Hedge Fund Mudrick Capital $200M in Gains
Pension funds are not buy and hold as a rule. They also invest in a variety of other vehicles, including hedge funds with different strategies. I guess you could say they buy and hold in the hedge fund, but that's different. Very conceivable that a pension fund had a meaningful uptick because one of the funds it invests in timed GME's crash well.
fractionalhare··on “WSB veterans know that they're making a suicide charge for the memes”
A lot of new shorts have also jumped in when the old ones left. The old shorts haven't necessarily bought back in, especially if they're running cautious after getting their faces ripped off.
fractionalhare··on “WSB veterans know that they're making a suicide charge for the memes”
Kind of. But it really depends on your relationship and agreement with your prime broker.
fractionalhare··on “WSB veterans know that they're making a suicide charge for the memes”
Banks are prone to bailouts, hedge funds are not (in the traditional sense of taxpayer money, not private investment).

Many banks control trillions of dollars. Hedge funds almost always have less than $50B, usually by one or two orders of magnitude. If a bank fails, it's actually a problem for the government. If a hedge fund fails, it's barely a blip. If the limited partner was smart, it will also only cause them a single digit percentage decrease in their portfolio.

Hedge funds can amplify a systemic risk, but they would not really be targets for a bailout, the banks would be.

fractionalhare··on “WSB veterans know that they're making a suicide charge for the memes”
Putting that reasoning aside: do you have a link you could share that shows any of these ads?
fractionalhare··on “WSB veterans know that they're making a suicide charge for the memes”
Briefly: a share which has been sold short can be sold short again by the person who buys it from the borrower/short seller. In practice, this often occurs due to regular market mechanics when a particular company is a hot short target. All that's required is a widespread consensus that the company's financials suck (in not so few words).
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