How My Polymarket Arbitrage Bot Made $130k+ Using Simple YES + NO Mispricing

Most people think Polymarket arbitrage is dead. They’re wrong. My bot continuously scans hundreds of markets (politics, sports, crypto, geopolitics, culture) looking for the classic inefficiency: YES + NO price summing to less than $1.00. When it finds one, it buys both sides instantly. This pure risk-free strategy has been one of the core engines behind the bot’s $130k+ profit. Even after fees and competition, small edges still appear every day if you have speed and capital.

I’ll break down the exact logic and risk controls in this post.