The Sui blockchain has started a daily buyback program for its native token SUI, using yield generated from stablecoin reserves. The buybacks are executed via TWAP-style orders to reduce slippage and front-running risk. Sui's on-chain stablecoin market cap sits at roughly $428 million as of August 3, per DefiLlama.
Where the yield comes from
The yield fueling the buybacks comes from two sources: interest on fiat-backed stablecoin reserves held by Sui-aligned treasuries, and conservative on-chain yield products like tokenized T-bills. One of the stablecoins involved, USDsui, had a circulating market cap of about $71–72 million in late July, according to CoinMarketCap. The size of each daily buyback depends on current stablecoin balances and prevailing interest rates — it's not a fixed amount.
How the buybacks are executed
The program runs daily using TWAP-style orders to minimize market impact and front-running risk. The team stressed that the buyback is not a price guarantee; its size varies based on available yield and transparent execution. Credible buyback implementations should disclose fund sources, publish wallet addresses and dashboards, and use execution strategies to limit slippage and MEV exposure. Sui hasn't yet published a public dashboard for the buyback wallet, which would allow independent verification.
Why now
The timing coincides with a scheduled unlock of 25,666,876 SUI that occurred around July 3, 2026. Daily buybacks can tighten spreads, lift baseline depth, and reduce net flow lumpiness — especially around supply events like token unlocks. Sui's throughput hit a record 6,086,766 transactions per second in a public test on July 4, and the network has processed over $1 trillion in stablecoin volume since August 2025. The buyback program could help absorb some of the selling pressure from unlocks, but the project warns its size isn't fixed.
Risks to watch
The main risks include opacity around the yield source, peg or counterparty risk on the stablecoins used, and the assumption of a hard price floor — which doesn't exist. If the yield dries up or the stablecoin reserves shrink, the buybacks would shrink too. The project hasn't announced an end date for the daily purchases, leaving the program's duration open-ended.
