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a quant who started as a technical trader explained what changed everything for him he stopped trying to predict where price goes he started measuring the probability of each market state and betting only when the math was asymmetric that shift took him from drawing trendlines to writing models...

112,271 Aufrufe • vor 3 Monaten •via X (Twitter)

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a quant at a prop firm showed me a 5x5 grid on a napkin said: > this is our entire edge. we don't predict price. we predict which box the market is in and where that box historically leads i didn't understand it for weeks. then it clicked never looked at a chart the same way since grid is called a Markov Chain transition matrix. the math is from 1906, it's in every probability textbook on earth and hedge funds use it because it asks a completely different question than retail traders ever ask retail: will this go up or down quant: what state is this market in, and where does this state typically go every market lives in one of maybe 5-6 states at any given moment tight range, volatility compression, trending with momentum, post-spike reversal, pre-breakout coil not random labels - clusters you identify from actual data using volatility, volume, and momentum readings stacked together once you have the states, you build the matrix: P(state 2 -> state 4) = 73% P(state 4 -> state 1) = 61% P(state 1 -> state 3) = 68% each cell is a historical probability. now when the market is in state 2, you're not guessing you're betting on 73% historical completion. you size it with Kelly. you take the trade when the math says to, not when it feels right i built this on BTC using 2 years of 4-hour data. identified 5 states one i labeled "volatility compression below 20-day mean for 6+ consecutive candles" transitioned to a directional move above 1.8 ATR in 71% of cases average reward/risk on those trades: 5.4 that's not prediction. that's reading a probability table the market keeps filling in for you every single day the part that should bother you: the data to build this is free. the framework is in any quant textbook python to implement it is maybe 200 lines what Renaissance Technologies has that you don't isn't secret data or proprietary signals it's this framework applied to higher-resolution data with more sophisticated state definitions you're not missing information you're asking the wrong question every single time you open a chart

Livsun

189,343 Aufrufe • vor 4 Monaten

In 1988, Jim Simons flew to Berkeley to beg a math professor to fix his hedge fund. The professor had never traded a stock. He had spent his career on coding theory and mathematical board games. He agreed to help on the condition he could leave when he wanted. He delivered 55 percent net in his full year running it. Then he handed the whole thing back and went home to teach undergraduates. His name was Elwyn Berlekamp. He is one of two people who ever ran what would become the most profitable trading operation in history. Simons was the other one. MIT math PhD, 1964. Berlekamp wrote foundational papers in coding theory that still run every CD, DVD, satellite link, and QR code on Earth. The Berlekamp-Massey algorithm, published 1968, is why every scratched CD you owned still played through to the end. He also co-wrote "Winning Ways for Your Mathematical Plays" with John Conway and Richard Guy. Four volumes. It became the foundational text of combinatorial game theory. Berlekamp thought about board games the way most mathematicians think about theorems. He proved endgame results in Go that professional masters had assumed were unprovable. His 1994 book "Mathematical Go" reduced the last moves of a Go game to a formula. Top-ranked professionals started studying it. Simons had a problem in the late 1980s. His trading partnership was falling apart. The fund was losing money. He flew west to see the game theorist. Berlekamp bought a controlling stake, cut what was not working, and rebuilt the trading logic from combinatorial game theory principles. The fund returned 55 percent net after fees in his full year running it. In December 1990, Berlekamp sold his stake back to Simons and walked out. He wanted to go back to Berkeley. In interviews he said the same thing many times, in different words: Berkeley was where he belonged. Simons kept building on the system Berlekamp rebuilt. It became the Medallion Fund. Over the next 30 years, Medallion compounded at roughly 66 percent gross per year. It is the most profitable trading strategy in the history of finance. Berlekamp took his cut in 1990 and never went back. He spent the rest of his life at UC Berkeley. He gave a lecture called "Mathematics and Go" that is on YouTube. He died in 2019, aged 78. The paradox is not that Berlekamp made a fortune. It is that he had the door to the biggest fortune in trading history held open for him and walked out. The math was fun. The billions were not.

Veles

73,226 Aufrufe • vor 2 Monaten

a prop trader from chicago made $847k in 180 days just by asking one question every single morning that 99% of traders never ask he didn't build a new model didn't touch machine learning just opened excel and spent 8 minutes on one calculationthe question: what state is the market in right now, and where does it statistically go next most traders ask "will this go up or down". that's 50/50 he started asking "is the market trending, ranging, or reversing" and then looked at the historical probability of each transitionturns out markets don't flip randomly they cycle through states. each state has a fixed probability of shifting to the next onehe built a 5x5 grid on a napkin: trending up -> 68% stays trending, 21% flips to range, 11% reverses ranging -> 54% stays range, 28% breaks up, 18% breaks down trending down -> 61% stays falling, 24% to range, 15% reverses he didn't predict direction he just calculated which state had the highest expected value and sized the position with kelly criterion that's the entire edgethe framework is from 1906 - andrei markov. free in every probability textbook on earthrenaissance technologies has been running this since 1988 37 years of 66% annual returnsdata costs nothing - yahoo finance, federal reserve, any broker implementation is 200 lines of python what separates him from the retail traders losing money isn't intelligence or capital or luck it's that he was willing to think differently about the same data everyone else sees every single day they kept you staring at candles while the people who got it were reading transition matrices bookmark this - you're either asking the wrong question or you're not asking it at all

Livsun

41,765 Aufrufe • vor 2 Monaten

a trader in Shanghai has been running 71% annual returns since 2019 without ever touching a Western exchange nobody outside Weibo knows his name he doesn't manage outside capital, never went on a podcast, never posted a P&L screenshot pause at 0:34 - look at the monitor behind him on the right that's not a price chart. that's a 6x6 state transition matrix built from 11 years of Chinese A-share data he found something in 2018 that every quant textbook describes but almost nobody applies CSI 300 price-state transitions are predictable at a level that makes S&P pattern noise look clean by comparison he mapped 6 market states: trending-up, trending-down, range-tight, range-wide, vol-compression, spike-decay then calculated every historical transition probability across 11 years of 30-minute bars: trending-up -> stays trending: 63% vol-compression -> spike-decay: 78% range-tight -> breaks directional: 71% now he's not predicting direction. he's entering when math says 71% historical completion, sizing with Kelly, closing in under 30 minutes 28 min avg hold, worst month -3.1%, best year +94% framework is markov's from 1906. A-share data is free on WIND Terminal implementation: roughly 180 lines of python insight was never about math - it was about where to aim it Chinese A-shares have thinner institutional algo penetration than US equities. patterns don't get arbed out as fast statistical edges persist for months longer than they would on SPY retail in Shanghai trades on gut. US quants are chasing S&P microstructure nobody was running transition matrices on Chinese state sequences at any real scale he aimed a 119-year-old framework at a market nobody was watching and held the edge for 6 years bookmark this before it becomes obvious math is free, data costs nothing what took time was realizing the most exploitable market wasn't the most-watched one they kept you watching SPY candles while the cleanest probability table on earth sat untouched in Shanghai

Livsun

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