Hylo

Hylo is a Solana-native DeFi protocol that addresses two challenges the broader stablecoin and derivatives markets have struggled to solve simultaneously: liquidation-free leveraged exposure to crypto assets, and a highly decentralized stablecoin without dependence on real-world assets or off-chain counterparties. Its tagline, "Better Internet Money," signals an ambition to build programmable collateral that earns yield while remaining composable across Solana's DeFi stack.

The protocol reached $100 million in TVL within four months of public launch and generated more than $6 million in annualized fees during that period, making it one of Solana's breakout DeFi protocols of 2025.

The Dual-Token Core

Hylo's architecture rests on a single mathematical invariant: Collateral TVL equals hyUSD supply times one US dollar plus xSOL supply times xSOL price. Every unit of collateral deposited is allocated simultaneously to two synthetic outputs: hyUSD, a USD-pegged stablecoin, and xSOL, a token providing leveraged SOL exposure. The two tokens exist in dynamic balance — when xSOL's value rises, more collateral backs hyUSD; when it falls, xSOL holders absorb the difference. This relationship lets xSOL capture amplified upside (roughly 2–3x) without liquidation thresholds, while hyUSD maintains its peg through structural arbitrage rather than centralized reserves.

Collateral is drawn exclusively from Solana liquid staking tokens — mSOL, JitoSOL, and bSOL — ensuring deposited assets continue earning native staking yield. This dual-productivity model differentiates Hylo from conventional stablecoin designs where backing assets sit idle.

hyUSD and the Stablecoin Layer

hyUSD is a multi-collateral, yield-bearing stablecoin pegged to one US dollar. It does not depend on centralized reserves like USDC or on CDP-style liquidations like early DAI. The peg is maintained through arbitrage incentives: minting becomes profitable when hyUSD trades above peg, and redemption becomes profitable when it trades below. There is no external oracle dependency for the core peg mechanism.

Users who stake hyUSD receive sHYUSD, a yield-bearing receipt token. Reported sHYUSD yields have reached approximately 17% APY, sourced from LST staking rewards (6–7%), protocol fees, and rebalancing risk premiums.

Hylo subsequently introduced eHYUSD, a fully delta-neutral yield-bearing asset that earns yield from every Leveraged Token in the protocol. Launched with an initial minting cap of 15 million USD, it was generating approximately 8.30% APY as of mid-2026.

xSOL and the xAsset Engine

xSOL provides long-term leveraged SOL exposure without the liquidation risk that afflicts traditional margin products. A 10% move in SOL translates to roughly 20% in xSOL; losses are absorbed through gradual token dilution rather than forced exits. This design eliminates the cascading liquidation events common in leveraged DeFi.

The V2 upgrade introduced the xAsset Engine, a generalized framework for creating tokenized leveraged products that behave like leveraged ETFs but operate entirely on-chain. Beyond xSOL and xBTC, the engine is architected to support equity-tracking xAssets, positioning Hylo to address a portion of the 180-billion-dollar US leveraged ETF market. V2 also extends the collateral universe to non-yielding assets like Bitcoin.

hyloSOL and Liquid Staking

Hylo issues hyloSOL and hyloSOL+ as its native liquid staking tokens for SOL. These feed directly into the collateral pools backing xAssets and hyUSD, creating a vertically integrated stack from base staking yield through to structured leverage products.

Risk Management

Hylo's stability framework operates at the individual pool level, isolating stress in one collateral type from the broader system. Each pool maintains a collateral ratio (CR) targeting approximately 150%, organized into six rebalance zones. Buy zones at 165% and above see the protocol purchasing collateral to reduce excess backing. A neutral zone between 135% and 165% requires minimal intervention. Sell zones between 100% and 135% trigger collateral sales to restore balance. Below 100%, loss absorption mechanisms engage.

As CR falls, progressively stronger protections activate in sequence: dynamic fee routing redirects inflows toward healthier pools; subsidized swaps incentivize rebalancing; minting blocks prevent new supply creation outside healthy ranges; and an Earn Pool backstop burns hyUSD reserves to absorb losses. The system ensures hyUSD remains fully backed as long as aggregate collateral across all pools exceeds aggregate stablecoin supply — individual pool stress does not automatically cascade system-wide.

Audits and Security

Hylo was audited by OtterSec in May 2025. The assessment covered Exchange and Stability Pool contracts against commit 3c91e4a, with a follow-up review against commit 796267d. OtterSec reported seven total findings, including one vulnerability involving potential exploitation via EMA price deviation — exploitable only when spot and EMA prices diverged by more than 1%. The issue was resolved before mainnet deployment.

Funding and Team

Hylo closed a 1.5 million USD seed round in August 2025, backed by Robot Ventures, Colosseum, and Solana Ventures. The founding team includes individuals identified as Anna, Luke, and Thomas; the protocol operates with limited public disclosure of individual backgrounds.

Ecosystem Integration

Hylo has attracted meaningful DeFi composability. DeFi Development Corp. (DFDV), a Nasdaq-listed company that holds SOL on its corporate balance sheet, partnered with Hylo in January 2026 to deploy treasury capital into hyUSD and sHYUSD for yield optimization. Exponent Finance integrated PT-hyloSOL and PT-hyUSD to enable fixed-rate yield products built on top of Hylo's infrastructure. Project0 added rollover support for Hylo principal tokens, letting users move between maturities without manual unwinding.

The protocol's XP points system — rewarding hyUSD minters, sHYUSD stakers, and xSOL holders — has driven early adoption with implications for future governance or token distribution.