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%-pranav
23K posts
%-pranav
@_nav__
elite retweeter ||||| Twitter was so much more physical in the '90s
Chicago, IL انضم Şubat 2012
745 يتبع412 المتابعون
%-pranav أُعيد تغريده
Had a Jane Street interview in 2014
Round 7. Interviewer says 'meet me at Washington Square Park, southwest corner, 2 PM.'
I show up. He's playing chess with a guy who's clearly hustling tourists. Interviewer's losing badly.
Without looking up he says, 'Take my position.'
I sit down. The chess hustler looks at me and grins. 'Your boy owes me $40. You covering his position?'
I look at the interviewer. He nods.
'Assume the debt,' he says. 'Now optimize.'
I study the board. I'm down a queen and two rooks. Completely hopeless.
'This position is unwinnable,' I say.
'Correct. Now make it profitable.'
'What?'
The chess hustler is getting impatient. 'You playing or what, kid?'
The interviewer slides me a $20. 'Market make this game.'
I'm confused. 'How do I market make chess?'
'Bid-ask on the number of moves until checkmate. Hustler takes the under, you take the over. Spread is your edge.'
I look at the position again. Maybe 8 moves max until I'm mated.
'I bid 12 moves, offer 15,' I announce.
The hustler laughs. 'I'll take the under on 12 all day.'
'Done,' says the interviewer. 'You're now short volatility on a deterministic outcome.'
Three moves later I'm checkmated. I owe the hustler $40 plus my $20 bet.
'How confident were you in that 12-move bid?' the interviewer asks.
'0.95,' I say, because that's what you always say.
'0.95 huh?' He chuckles. 'You just sold insurance on the Titanic.'
He stands up. 'The real trade was shorting your confidence and going long on the hustler's experience. You missed the obvious hedge: offering chess lessons to tourists at $25/hour while the game played out.'
'But I don't know how to play chess well enough to teach.'
'Exactly. That's called selling vol you don't have. Very Jane Street.'
Offer rescinded. Reason: 'Failed to recognize that the park itself was the market and the pigeons were the only rational actors.'"
Deedy@deedydas
Jane Street made ~$40B in 2025 with 3,500 employees, a ~2x from the year before. At ~65-70% profit margin, that's $8M profit / employee, the highest for a 1000+ ppl company. High-frequency trading continues to be the most efficient money making engine. I want to share an old story about my Jane Street interview in 2014. Jane Street was known for hiring a lot of math, physics and CS olympiad winners from top universities and putting them through many rounds - including, for trading roles, a gauntlet of mental math. It was my 6th interview and my final round and I recall being asked "What is the next day after today in DD/MM/YYYY where all the digits are unique?" They'd toy with you and say "You can use a pencil and paper, if you want" but you knew that was an instant no. Painstakingly and as quickly as I could, I came to an answer. "How confident are you that this is correct on a 0-1 probability scale?" the interviewer said. "0.95", I blurted out, not fully knowing how to answer that. "Are you sure?" After thinking harder for a few more seconds, I realized I could've flipped the digits around to get a closer date. I gave the interviewer my answer. It was correct. "0.95 huh?" he chuckled. That's when I knew I failed. Note: fwiw, other companies that come close in efficiency are - Tether ($90M+ profit/emp) - Hyperliquid ($80M+ profit/emp) and on revenue: - Valve ($50M/emp) - OnlyFans ($37M/emp) - Craigslist ($14M/emp) - Anthropic ($12M/emp, run rate) - OpenAI ($8M/emp, run rate) For comparison, Nvidia is very efficient at scale and is $4.4M/emp.
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Pretty crazy draft night. Didn’t see this coming, thank you.
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Nah man Dan Hurley is a PSYCHO. Why he do this to the referee 😂🤣
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Doing this after going up 1 with 0.4 left is insanity. Youre daring that ref to T you up and give Duke free throws to win it.
Hes out of his mind and I love it
Hater Report@HaterReport
Nah man Dan Hurley is a PSYCHO. Why he do this to the referee 😂🤣
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Harry Potter canonically played 9 quidditch games in six whole years of school #TheBoyWhoLoadManaged #PandemicPotter
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The old “I just made $925,000, more than 3x what I’ve ever made in a week playing golf so I’m gonna enjoy this one for a minute.”
Hell yeah.
Underdog Golf@UnderdogGolf
Sudarshan Yellamaraju a WD from the Valspar Championship.
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%-pranav أُعيد تغريده
🔙 When Bonzi was broken while he was serving for the match against Medvedev at US Open 2025…. 8min of chaos
Meddy : "Are you a man? Why are you shaking? What's wrong? Guys, he wants to leave. He's paid by the match, not by the hour"
SK@Djoko_UTD
What's the biggest on court fight/Drama you've witnessed in tennis ??
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Still cant believe Chris Broussard said this on live television 😭💀
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ngl every time I see Sam and Dario
i'm reminded of Richard Hendricks and Dan Melcher from the Silicon Valley tv show 😭
Mohandas Pai@TVMohandasPai
A meeting of Rivals! Only in India @narendramodi
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every winter olympics they bring up this legend 🤣 he only qualified at the heats bc 1 guy in front of him got disqualified. and he only placed 1st in the semis bc 2 others crashed and 1 got disqualified for cheating 😹 then he won GOLD bc he was so far behind he didn’t crash LOL
Chris Fronzak@FRONZ1LLA
"Dude there's no way you could ever win unless every single person in front of you crashed"
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