fastUSD is the native yield bearing stable asset of Sei, made possible by Elixir. Fully collateralized by Elixir's deUSD, and powered by the launch of Elixir's network infrastructure on Sei, fastUSD offers a new unified and natively yield-bearing core liquidity component within the ecosystem. Native yields stem from deUSD's underlying collateral assets, which are a blend of treasury and basis trade exposure.