Jason Levy

jaylevy.eth - Fullstack web dev - React, Node Staff Engineer

[Jason Levy @jaylee622]

@ryancohen I was here

[Jason Levy @jaylee622]

@0xTengen_ @Polymarket Been watching this wallet for a few weeks. My theory is this is @0x8dxd new wallet. Strategy is very similar and that wallet stopped being active right around when this one started up

[Jason Levy @jaylee622]

@KamilFabian @0xbobaaa This

[Jason Levy @jaylee622]

The wallet is real and the profit is real -- I've verified the on-chain activity independently across nearly 3 million trades spanning February through late March 2026. But the article's strategy characterization is wrong in ways that would lead anyone following it in the wrong direction.

0x8dxd is not running latency arbitrage. Here's what the on-chain and Data API records actually show:

They are a passive market maker, not a taker. On-chain OrderFilled events show zero taker fills across 560K+ indexed transactions. Every single execution is a resting maker order. A latency arb bot *must* cross the spread as a taker to capture mispricing before others react. 0x8dxd never does this -- they post orders and wait for the market to come to them. This also means they collect maker rebates (https://t.co/97ElImfgxm) on every fill rather than paying taker fees.

They quote both sides on 95%+ of markets. Across 9,000+ markets in March alone, only ~5% were purely one-sided. On the remaining 95%, they placed buy orders on both UP and DOWN outcomes. Their combined entry price (VWAP_up + VWAP_down) averages ~0.93 -- meaning they pay about 93c total for contracts that pay out $1.00 regardless of outcome. That ~7c spread is the engine. This pattern is stable: February and March numbers are nearly identical on every metric.

They do tilt directionally within markets -- the median balance ratio between UP and DOWN volume is about 0.56, meaning they typically put ~1.8x more on their favored side. So they likely use external price signals (Binance, Chainlink) to inform how much to weight each side. But the core revenue is spread capture, not directional betting. This is a market maker with an informed quote-sizing model, not an arb bot racing to exploit a lag.

Some factual corrections:

- "98% win rate" counts individual fills. When you're buying cheap contracts on both sides of a market, most individual fills "win." The meaningful metric is per-market profitability, which is closer to ~71% of markets with combined entry below 1.0.

The actual strategy -- dense two-sided passive quoting with directionally-informed sizing across BTC, ETH, SOL, and other markets -- is more sophisticated and more interesting than "detect Binance lag and buy the obvious side." It requires a real probability model, passive execution infrastructure, and continuous inventory management. Framing it as something reproducible from a single AI prompt is misleading.

[Jason Levy @jaylee622]

I backtested this against 2,538 resolved Polymarket 5-min BTC markets using 1M+ orderbook snapshots. It doesn't work.

The problem is adverse selection. When BTC direction is obvious, the book is completely one-sided and nobody is selling you winner tokens at 90-95¢. When you actually can get
filled, it's because the outcome is a toss-up and your win rate drops to 30-45%.

I swept 150 different parameter combos. Every single one loses money.

Zero maker fees sound great until you realize you can never get filled on the winning side.

[Jason Levy @jaylee622]

@constantout @peer_rich https://t.co/UbFss7lbH2

Look no further ❤️

[JD Vance @JDVance]

What possible interest would the US government have in keeping Epstein’s clients secret? Oh…

[Jason Levy @jaylee622]

@josephstein @thekitze Just started a new project with RNR and it has been so nice to work with!

[Jason Levy @jaylee622]

@AdamRackis context7 was the first example that made me “get it”. I use it a lot now with Claude Sonnet 4.5 and it has been very helpful, highly recommend checking it out

https://t.co/VMW2iLDXgu

[Jason Levy @jaylee622]

@thdxr American Alchemy is a weekly must-watch for me. Jesse is an incredibly smart and open-minded guy and he talks to some very interesting people about the UAP phenomenon and consciousness. Highly recommend

https://t.co/RlkeQIuHez

[Jason Levy @jaylee622]

@CryptoMax_07 Literally this

[Jason Levy @jaylee622]

@NVIDIAGeForce GeForce Day

[Jason Levy @jaylee622]

@leerob Congrats Lee! Looking forward to seeing what I can learn from you next!

[Jason Levy @jaylee622]

@AdamRackis Zustand Master Race

[Jason Levy @jaylee622]

@thdxr Is this the start of some Kanye-esque dax arc?

[Jason Levy @jaylee622]

@rauchg @vercel @v0 A good way to measure code coverage on my Next projects

[Jason Levy @jaylee622]

@thdxr Actual banger

[Jason Levy @jaylee622]

@Madisonkanna As someone who lost a parent unexpectedly, I couldn’t agree more with this sentiment. We just never know what course life will take so treat every day as a blessing

[Jason Levy @jaylee622]

@thdxr 🔥⛽️🔥

[Jason Levy @jaylee622]

@thdxr I’m imagining being able to interact with DataDog using natural language like this. That would be incredible