The feed architecture
RedStone deployed a savUSD/avUSD exchange rate feed on Stellar. Launched May 29, 2026. Built to SEP-40 spec—the first standardized oracle interface on Stellar's mainnet.
What this means for integrators:
- One feed, many consumers. No bespoke pricing wiring per protocol.
- Continuous NAV delivery for smart contracts on Soroban.
- Gas overhead stays low. Push-style updates sidestep per-call oracle transactions.
RedStone reports zero mispricing events across existing feeds. Deviation thresholds are tight. Latency is sub-second. That's the bar for senior-tranche collateral.
What protocols unlock
SavUSD is a senior-tranche token from Avant Protocol, backed 1:1 by USDC and USDT. Yield comes from delta-neutral basis trades and funding rate capture. Value drifts with accumulated yield, not a $1 peg.
Without onchain NAV, DeFi primitives couldn't touch it:
- Lending: no collateral valuation
- DEXs: no routing baseline
- Auto-rebalancers: no rebalance trigger
Now they have it. Pennyworks handles weekly offchain NAV verification. RedStone delivers continuous onchain NAV. Two-layer price integrity: weekly audit cadence plus real-time oracle feed. Hard to game either channel.
Rollout trajectory
SEP-40 deployment kicked off March 2026. RedStone plans gradual expansion through the year. Six more issuers slated for oracle support by end of August. That broadens the collateral pool significantly.
| Metric | Value |
|---|---|
| Stellar RWA TVL (Jan 2026) | ~$800M |
| Stellar RWA TVL (Jul 2026) | $3B+ |
| Feed launch date | May 29, 2026 |
| Standard | SEP-40 |
| Offchain verification | Pennyworks (weekly) |
| Onchain verification | RedStone (continuous) |
| Additional issuers planned | 6 by end of August |
Watch points for builders
- Benchmark RedStone's deviation thresholds against Chainlink on equivalent RWA feeds. Latency numbers should be public.
- Track the six additional issuers. More collateral diversity means more composability surface.
- Measure gas overhead per NAV update on Soroban. SEP-40 push vs. pull mechanics have cost implications.
- Stress-test liquidation logic against oracle latency. Senior tranche NAV drifts slower than volatile assets, but stale data during a basis-trade unwind can still cascade.
- Verify TWAP/VWAP compatibility for DEXs routing through savUSD pairs.
SavUSD pricing is now infrastructure, not a custom integration. That's the structural shift. Tokenized Treasuries and yield-bearing stables need this baseline before they scale into TradFi rails—and before the next $3B sits unlocked.