Stability Pool & Yield
Aspan’s Stability Pool is not just a place to store apUSD—it is a high-yield automated wealth management vault.
Where Does the Yield Come From?
This is the most concerned question for DeFi users. Aspan’s yield is Real Yield, not token inflation.
All underlying assets held by the protocol (slisBNB/BNBx) continuously generate BNB staking rewards.
Since xBNB holders forgo these rewards (in exchange for leverage), all yields generated by the total TVL are pooled into the Stability Pool.
Leveraged Yield: If the system leverage is 3x, it means every $1 of apUSD is backed by $1.5 of LSTs generating yield. Therefore, the yield rate of s-apUSD is usually 1.5x or even higher than that of regular LSTs.
Auto-Compounding Mechanism
To adapt to the EVM characteristics of BNB Chain, we have designed a compounding logic that requires no user action:
Harvest: Every day, the Keeper Bot triggers the contract to tally the appreciation of LSTs.
Mint & Inject: The protocol mints new apUSD from the appreciated portion and directly injects it into the Stability Pool.
Exchange Rate Appreciation: The total assets of the Stability Pool increase, but the number of shares (s-apUSD) remains unchanged. Therefore, the exchange rate of s-apUSD to apUSD rises.
Day 1: 1 s-apUSD = 1.000 apUSD
Day 30: 1 s-apUSD = 1.015 apUSD
✅ User Experience: You only need to hold s-apUSD—your asset value will automatically grow over time without clicking "Claim".
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