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xSigma is a blockchain R&D lab that was created by ZK International, a publicly-traded company. xSigma Finance is a decentralized stablecoin exchange that provides the cheapest transactions for customers and a mining platform for liquidity providers.On one side, customers can exchange their stablecoins at the best rate; on the other side, liquidity providers offer their stablecoins to earn rewards.

xSigma code is not open source but the app is live on mainnet. Token is trading on Bittrex and Uniswap.