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smabie

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smabie
·last year·discuss
The original sin of Pandas is row indices
smabie
·2 years ago·discuss
Sounds like cope. The downside of applying is like.. close to zero? It's obviously +EV
smabie
·3 years ago·discuss
That's not true, NCs / gardening leave last about a year.
smabie
·3 years ago·discuss
Yeah I think you are wrong, and quants don't actually think like that.
smabie
·3 years ago·discuss
Yeah these are classic quant finance papers, but all in all not super helpful for anything except a basic foundation.
smabie
·4 years ago·discuss
I mean if you have one billion and you lose half you are not a billionaire any more?
smabie
·4 years ago·discuss
What does string escaping have to do with market making?
smabie
·4 years ago·discuss
Isn't this what taxes are?

Also just ignore that line, it's not actually true.
smabie
·4 years ago·discuss
Not sure exactly what you're trying to say but let me tell you, fills from other HFT firms are highly toxic.
smabie
·4 years ago·discuss
Not aware of a market maker that also doesn't take liquidity as well. In fact, it probably would impossible to market make without also taking (you wouldn't be able to provide liquidity if your quotes were in cross with the market).

That said market makers do a lot more making than taking.
smabie
·4 years ago·discuss
Sorry I meant to say buying puts (and have edited comment). Buying puts is directional and has negative carry. That's often fine because when your puts aren't making money your market making strategies should be doing well and vice versa
smabie
·4 years ago·discuss
Flow from other HFT / market makers is often very toxic. They are playing the exact the game as you.
smabie
·4 years ago·discuss
Generally good article that delves into how a market maker functions. Couple points:

Re EA: quoting my boss, EA isn't really a dominant thing in the market maker space, it's pretty much only espoused by a couple high profile individuals (mainly, SBF).

Re strategy: point about how there's little strategy involved in being a market maker is off-base. Everything is ultimately strategy: do I continue to pour resources into a strategy that is losing money in the hopes of eventually seeing pnl? What markets should I focus on? What is the best use of time for each employee that maximizes pnl/head? etc etc

One thing that I thought article got right is that most work involved in market making is about avoiding trades, not making them. Capturing the bid ask spread is conceptually easy. The hard part is avoiding trading with toxic counterparties.

Part about put options is especially apt. Market making during a crash / recession (like right now) is especially difficult because all the non-toxic counterparties have stopped trading as much (people like to trade a lot more during a bull market than a bear one). By setting up a structure such that you profit during a crash (either by buying puts, leaning net short, or through some other method), you introduce an uncorrelated return stream that can really help.
smabie
·5 years ago·discuss
What about Puerto Rico? I moved here 6mo to take advantage of the lowest taxes an American can get and it's pretty livable. Of course English is spoken as a second language, but all in all it's pretty livable
smabie
·5 years ago·discuss
Billionaire dictators get put in prison or worse all the time. However I suppose that's a subset of politician
smabie
·5 years ago·discuss
I'm not unaware I have been very personally affected by the opioid crisis. And I don't think the pharma companies are responsible. I haven't met a single opiate addict (and I've met far too many for one lifetime) who blames pharma companies.

They accurately place the blame on themselves.
smabie
·5 years ago·discuss
Sounds like everyone is guilty? Not a very useful perspective imo
smabie
·5 years ago·discuss
Hedge funds weren't the real winners, but rather prop shops/market making firms. January was the best month in the history of the universe for all the major prop shops: Citadel, Jane St, IMC, etc.

The two "vols": volume and volatility are the corner stones of all market making performance. Bonuses are mighty fine this year, that is for sure.
smabie
·6 years ago·discuss
it's well known as a top tier market making firm. They're not as special as they are made out to be, though. They just have good marketing.
smabie
·6 years ago·discuss
no not really. you can use public information to give you an edge. And I say this as a person who trades and develops models at a vety successful market making firm.

Alternative data no one else can get easily certainly has tremendous value though.

Of course, predicting one or two seconds into the future (my primary concern) is easier than days or years, so there's that.