Crypto Gloss

LSTfi

LSTfi (Liquid Staking Token DeFi) is the category of DeFi activity built around deploying liquid staking tokens (stETH, rETH, cbETH, frxETH, sfrxETH, swETH) as productive assets within DeFi protocols — rather than simply holding them for the base staking yield. The key insight of LSTfi: liquid staking tokens are rare in DeFi because they are simultaneously productive (yield-generating) AND liquid (tradeable, collateralizable) — compared to raw ETH (liquid, not yield-generating) or native staked ETH (yield-generating, illiquid). This dual property makes LSTs ideal DeFi collateral: users can deposit stETH into Aave, borrow USDC against it, deploy the USDC elsewhere, and still earn ~4% stETH staking yield on the full stETH position — a capital efficiency strategy with no equivalent in traditional staking. LSTfi encompasses: lending (stETH as Aave collateral for USDC borrows); AMM liquidity (Curve stETH/ETH pools — deepest liquidity exit for large stETH positions); yield splitting (Pendle Finance splitting stETH into fixed PT and variable YT); leverage staking (looping: deposit stETH → borrow ETH → swap → more stETH → deposit → repeat; amplified staking yield at liquidation risk); and structured products (yield vaults combining multiple LSTfi strategies). Post-Shapella (April 2023), LSTfi matured significantly as the stETH/ETH peg became near-perfect (withdrawals enabled; arbitrage risk-free) — allowing LSTfi strategies to be modeled with near-zero peg risk.

Key Facts

  • Core assets: stETH, wstETH (Lido), rETH (Rocket Pool), frxETH/sfrxETH (Frax), cbETH (Coinbase), swETH (Swell)
  • Primary protocols: Aave v3, MorphoBlue, Curve, Pendle Finance, Yearn Finance
  • Shapella (April 2023): ETH withdrawals enabled → stETH peg: near-perfect → LSTfi risk profile: improved
  • stETH Aave: largest single DeFi collateral category by notional ($8B+ at peak)
  • Curve stETH/ETH pool: historically DeFi’s deepest liquidity pool; created the LST composability foundation
  • Leverage staking: borrow ETH against stETH, buy more stETH; net APY = (staking yield – borrow rate) × leverage

Core LSTfi Strategies

The following sections cover this in detail.

1. Simple LST Holding

Strategy: Deposit ETH → stETH → hold

Yield: Base staking yield (~4% APY)

Risk: Minimal (smart contract risk; stETH peg risk — minimal post-Shapella)

Suitable for: Risk-averse ETH holders; ETH bulls who want baseline yield

2. LST as Lending Collateral

Strategy: Deposit stETH on Aave v3 → borrow USDC/ETH → deploy capital elsewhere

Example (Aave v3 mainnet):

  • Deposit: $100,000 stETH (earning ~4% APY = $4,000/year)
  • Borrow: $60,000 USDC (at 70% LTV; cost: ~5% borrow rate = $3,000/year)
  • Net: +$4,000 staking – $3,000 borrow = +$1,000 base
  • Plus: USDC deployed in yield strategy (e.g., $60K USDT stablecoin yield ~5% = $3,000)
  • Total: $7,000/year on $100K collateral = 7% effective APY

Risk: Liquidation if stETH price falls vs. ETH (rare post-Shapella but possible); USDC strategy risk

3. Leverage Staking Loop

Strategy: Use Aave (or Morpho Blue) to loop-borrow ETH against stETH repeatedly

Mechanism:

  1. Deposit 100 ETH worth of stETH into Aave
  2. Borrow 70 ETH (70% LTV)
  3. Convert 70 ETH → 70 ETH of stETH (via Lido or AMM)
  4. Deposit 70 stETH more into Aave
  5. Borrow 49 ETH (70% of 70 ETH)
  6. Repeat…until capital depletes

Net effect: 3-5× leveraged stETH position

Net APY: (staking yield – ETH borrow rate) × leverage

  • Staking yield 4%; ETH borrow rate 2%; spread 2%; 3× leverage = 6% net APY (vs. 4% unlevered)
  • But: concentration risk (stETH/ETH depeg → all positions liquidated)

Used by: Sophisticated yield farmers, institutional desks, automated Yearn/Gearbox vaults

4. Pendle Yield Splitting

Strategy: Deposit wstETH to Pendle → receive PT-wstETH and YT-wstETH

See Yield Stripping and Pendle Finance for full mechanics.

LSTfi context:

  • PT-wstETH: lock in fixed staking yield (hedges against yield decline)
  • YT-wstETH: speculate on staking yield increases (or harvest EigenLayer points on LRT variants)
  • LSTfi strategy: sell YT (give up upside) for higher PT yield (lock-in bonus)

5. Curve LP

Strategy: Provide liquidity to Curve stETH/ETH pool

Yield: Swap fees + CRV rewards + (sometimes) LDO incentives

Purpose: Enabling the LST ecosystem (your liquidity = others’ exit ramp from stETH → ETH)

Risk: IL (impermanent loss) if stETH/ETH peg deviates; Curve smart contract risk

The stETH Depeg Risk and Post-Shapella Evolution

Pre-Shapella (before April 2023):

  • stETH → ETH: only via Curve pool (AMM secondary market)
  • stETH depeg risk: real (Celsius sold $450M stETH → 6% discount — June 2022)
  • LSTfi risk: all strategies: “stETH might briefly depeg → liquidation cascade”
  • Result: conservative LSTfi (lower leverage; extra haircut)

Post-Shapella (April 2023 onwards):

  • stETH → ETH: via Lido withdrawal queue (1:1; guaranteed; 1-7 days)
  • Arbitrage: buy stETH at discount → queue withdrawal → receive ETH → instant peg
  • stETH peg: near-perfect (0.9998-1.0000 ETH)
  • LSTfi: risk-adjusted strategies: improved (peg risk: near-eliminated)
  • Result: LSTfi flourished post-Shapella; leverage strategies: more popular (lower peg risk)

LSTfi Composability Risks

Systemic risk: stETH correlation

  • If all LSTfi protocols use stETH → correlated exposure
  • Single stETH depeg event → Aave positions, Morpho positions, Curve LP all affected simultaneously
  • Post-June 2022: protocols: implemented stETH concentration limits

Oracle risk

  • Aave/Morpho: use Chainlink stETH/ETH price feed
  • Oracle: assumes exchange rate is real-time; may lag in fast-moving market
  • Risk: oracle price ≠ AMM price during volatility → incorrect liquidation decisions

Leverage cascade risk

  • Looping strategies: N× exposure; N× liquidation speed
  • 3× leveraged stETH: liquidated at: depeg × liquidation LTV
  • Example: 75% LTV; 3× leverage; liquidated when: stETH < 0.97 ETH (3% depeg)
  • In June 2022: stETH reached 0.94 = 6% depeg = only 2× leveraged positions safe

Related Terms

Sources

  1. “stETH as DeFi Collateral: Aave’s Integration and the $8B Liquid Staking DeFi Category” — Aave / Gauntlet Risk Analysis (2023-2024). Analysis of how stETH became Aave’s largest collateral category — examining the specific Aave v2/v3 parameters for stETH/wstETH (LTV, liquidation threshold, liquidation bonus, supply cap), the risk assessment methodology applied (stETH/ETH historical volatility, oracle quality, Lido smart contract risk), the DeFi strategies enabled by stETH collateral (leverage loops, borrow-and-deploy), and the supply evolution from stETH’s first Aave listing to its $8B+ peak collateral position.
  1. “Curve Finance’s stETH/ETH Pool: The Foundational LSTfi Liquidity Infrastructure” — Curve Research / Liquidity Analysis (2024). Historical analysis of the Curve stETH/ETH pool as the primary exit liquidity source for stETH (enabling the entire LSTfi ecosystem by solving the “what if I need to sell stETH quickly” problem) — examining the pool’s liquidity history (peak $5.4B; post-2022 contraction; post-Shapella evolution), the incentive structure (CRV gauge emissions + LDO incentives that maintained depth), how the pool’s depth enabled Aave and other protocols to accept stETH as high-LTV collateral, and why deep secondary market liquidity is prerequisite to LST DeFi ecosystem development.
  1. “Leverage Staking: The Math, Risk, and DeFi Protocols Behind stETH Loop Strategies” — DeFi Education / Leverage Staking Analysis (2024). Technical breakdown of leveraged stETH staking strategies — examining the explicit math (loop formula: effective APY = (staking yield − borrow rate) × leverage multiplier), the protocols enabling leverage (Aave, Morpho Blue, Gearbox Finance for automation), the liquidation risk dynamics, flash loan-enabled one-transaction looping, and the systemic risk implications of large amounts of leveraged stETH (estimated $2-4B in leveraged stETH positions at peak) for Ethereum’s stETH/ETH peg stability.
  1. “Pendle Finance and LSTfi: How Yield Splitting Created a New DeFi Primitive for LST Users” — Pendle Finance Research / LSTfi Analysis (2024). Analysis of Pendle Finance’s role in the LSTfi ecosystem — focusing on how Pendle converts liquid staking tokens (stETH, rETH) into fixed-rate (PT) and variable-rate (YT) instruments, the use cases this enables (fixed ETH staking yield for yield-risk-averse users; leveraged yield speculation for sophisticated users), and how Pendle expanded from pure LST markets into liquid restaking token (LRT) markets (weETH, ezETH) to become the primary derivatives platform for the liquid restaking narrative of 2024.
  1. “Post-Shapella LSTfi: How Ethereum Withdrawals Changed Risk Models and Strategy Design” — Ethereum Research / LSTfi Risk Evolution (2023). Analysis of how the April 2023 Shapella upgrade (enabling ETH withdrawal from the Ethereum beacon chain) fundamentally changed the risk profile of every LSTfi strategy — examining the mathematical effect on stETH peg stability (withdrawal arbitrage = near-perfect peg guarantee), how risk parameters across DeFi protocols (Aave LTV, Compound settings, MakerDAO risk) responded to improved peg stability, and whether the post-Shapella LST risk environment is sufficiently safe for institutional capital allocation to LSTfi strategies.