@The_Money_Buddy US is primarily a car based society. You need to have car to function. Basically he would anyways have to buy a car and 30,000 one time payment beats the egregious interest rates offered by dealerships.
A beater car is an asset. >> 1.35mil at 65
@mil000 I think they have laws, that make it mandatory to have side view mirrors for road legal cars. Tesla spent a bunch to get necessary certifications for mirrorless cars
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Offer rescinded.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.'"
Had a Jane Street interview in 2013 that still bothers me.
It was my 6th round. Final interview. The guy walks in carrying no laptop, no notebook, just a cold brew and what I later realized was a single IKEA tea candle.
He writes on the whiteboard:
food: $200
rent: $800
utilities: $150
candles: $3,600
family: dying
Then he turns around and says, “Optimize.”
I laughed because I thought it was a culture-fit bit. He did not laugh.
So I said, “Well, obviously you spend less on candles.”
He says, “Assume candles are non-discretionary.”
Okay.
I start building a model. Basic constraint satisfaction. Family survival as a soft penalty. Candles as a state variable. Maybe there’s an arbitrage where you buy wholesale paraffin and convert the $3,600 line item into inventory.
He stops me.
“You’re thinking like a consultant.”
That’s when I knew I was in trouble.
He says, “Give me a bid-ask on family dying.”
I say, “What?”
He says, “You’re long candles, short family. Where do you make markets?”
I try to recover. I say the real issue is liquidity: rent and utilities are fixed, food is elastic, candles are emotionally inelastic. Therefore the optimal strategy is to securitize future candle enjoyment and borrow against it.
He nods for the first time.
Then he asks, “What time do you sell the candles?”
I say, “Whenever the market is liquid?”
He says, “Be more specific.”
I say, “Uh… 10 a.m. Eastern?”
For the first time, he smiles.
He goes, “Every day?”
I say, “Every day.”
He says, “In size?”
I say, “In size.”
He says, “And what do we call that?”
I say, “Market manipulation?”
The room gets very quiet.
He looks disappointed and writes something down.
“No. We call it providing liquidity to candle ETFs during the U.S. cash open.”
I try to save it. “Right. Of course. The family isn’t dying because we underfunded them. They’re just experiencing temporary price discovery.”
He nods again.
Then he points back at the board.
I had missed it. The utility bill was $150, but candles provide light. You can zero out utilities.
I update the budget:
food: $200
rent: $800
utilities: $0
candles: $3,750
family: still dying, but now in a more capital-efficient way
He says, “How confident are you?”
I say, “0.95.”
He smiles and circles candles.
“0.95 huh?”
Then he asks me to estimate how many leveraged longs get liquidated if we dump $3,750 of candles at 10:00:01 every morning for 90 consecutive trading days.
Needless to say I did not get the offer.