The Greeks behind Morpho

The Greeks behind Morpho

November 24, 2025

Morpho is evolving. Known historically as a yield optimizer, Morpho is now a foundational layer for decentralized credit with permissionless market creation. With the upcoming release of Morpho V2, the protocol is introducing an intent-based lending platform powered by fixed-rate and fixed-term loans.

By reading their announcement, I said to myself:

What if we view Morpho V2 as an option protocol?

This article explores this idea, examining how the mechanics of fixed-term decentralized credit can effectively mimic the payout profiles and risk management strategies of options markets.

The Isomorphism of Lending and Options

The Merton Model: Corporate Debt as Options

The theoretical basis for this analysis is Merton's model (1974), which demonstrated that a firm's equity and debt can be priced using option pricing theory.

In the Merton framework, a firm has assets VtV_t and a zero-coupon debt of face value KK maturing at time TT.

  • Equity Holders have a residual claim.
    If VT>KV_T > K, they receive VTKV_T - K.
    If VT<KV_T < K, they receive 0.
    This payoff, max(VTK,0)\max(V_T - K, 0), is exactly the payoff of a European Call Option on the firm's assets with strike KK.
  • Debt Holders have a priority claim.
    If VT>KV_T > K, they receive KK.
    If VT<KV_T < K, they receive VTV_T (the assets).
    Their payoff is min(VT,K)\min(V_T, K), which is equivalent to holding a risk-free bond paying KK and selling a Put Option on the assets with strike KK.

Translating Merton to Morpho

We can map this framework directly to a Morpho market.

  • The Asset (VtV_t) is the Collateral Token (e.g., WBTC).
  • The Strike (KK) is the Loan Principal + Accrued Interest.
  • The Borrower is the Equity Holder. They hold the collateral but owe the debt. Their position is a Long Call Option on the collateral. They benefit from upside volatility.
  • The Lender is the Debt Holder. They are Short a Put Option on the collateral. If the collateral value crashes below the debt value (and liquidation fails), they take the loss.

The interest rate paid by the borrower is not just the "cost of money"; it is the option premium paid to the lender for writing the put option (insurance) against the collateral's downside.

The Barrier Option Refinement

The classic Merton model assumes default only happens at maturity TT. However, Morpho protocol enforce continuous solvency checks. If the collateral value drops below a certain threshold at any time t<Tt < T, liquidation is triggered. (I guess we could theoretically bypass this with a custom oracle, but I won't go into details here).

This transforms the Borrower's position from a standard European Call into a Down-and-Out Call Option (a Barrier Option).

  • The Barrier (HH): The Liquidation Threshold.
H=DebtLLTVH = \frac{\text{Debt}}{\text{LLTV}}
  • Knock-Out Event: If the collateral price StS_t touches or breaches HH, the option is "knocked out." The borrower loses the collateral (the underlying asset) and the loan is extinguished.

Mapping Black-Scholes Parameters to Morpho V2

The standard pricing equation for a call option C(S,t)C(S,t) is governed by five parameters: Spot Price (SS), Strike (KK), Time to Maturity (TtT-t), Risk-Free Rate (rr), and Volatility (σ\sigma).

Black-Scholes ParameterMorpho V2Description & Nuance
Spot Price StS_tCollateral ValueReal-time price from the Oracle (e.g., Chainlink).
Strike Price KKDebt PrincipalThe amount owed. In V2, for a fixed-term loan, KK is the Principal + Fixed Interest at maturity.
Barrier HHLiquidation PriceH=K/LLTVH = K / \text{LLTV}. The explicit trigger for the "Knock-Out." High LLTV means the Barrier is closer to Spot.
Time TtT-tLoan DurationIn V2 we can set explicit fixed duration (e.g., 30 days). This allows for precise Theta calculation.
Risk-Free Rate rrBase Yield / Risk-Free ProxyThe opportunity cost of capital (e.g., sDAI yield)
Volatility σ\sigmaToken VolatilityThe annualized standard deviation of collateral returns. This is the unobservable parameter that dictates the "fair value" of the spread.

Put-Call Parity

The fundamental theorem of derivatives pricing is Put-Call Parity,
which states that holding a Call option and Cash is equivalent to holding a Put option and the Underlying Asset.

C+KErT=P+SC + KE^{-rT} = P + S

In the context of a Morpho V2, we can replicate these exposures through borrowing and supplying assets.

The Synthetic Put (Shorting via Borrowing)

Consider a user who believes the price of ETH (asset SS) will fall. They wish to purchase a Put Option with a strike price KK. In Morpho V2, the user executes the following atomic transaction:

  1. Collateralize: Deposit stablecoins (USDC) worth CC.
  2. Borrow: Borrow ETH worth DD.
  3. Sell: Immediately swap the borrowed ETH for USDC.
  • Initial State: The user holds USDC (Collateral + Proceeds from Sale) and owes ETH.
  • Scenario A (Price Falls): The price of ETH drops. The user buys back the ETH at a lower price to repay the loan. The difference between the initial sale price and the repurchase price is profit. This mirrors the payoff of a Long Put.
  • Scenario B (Price Rises): The price of ETH rises. The debt becomes more expensive to repay.
  • The Stop Loss (Strike/Barrier): If the price rises to a point where the Loan-to-Value (LTV) hits the Liquidation LTV (LLTV), the protocol liquidates the collateral. This acts as a "Stop Loss" on the Put position.

The Synthetic Call (Leveraged Long)

Consider a user who believes ETH will rise. They wish to purchase a Call Option. In Morpho V2:

  1. Collateralize: Deposit ETH.
  2. Borrow: Borrow USDC.
  3. Loop: Swap USDC for more ETH and redeposit.
  • Payoff: The user now holds 1+Leverage1 + Leverage amount of ETH. If ETH rises, their equity expands non-linearly (convexity).
  • The Barrier: If ETH falls to the LLTV, the protocol sells the collateral to repay the debt. The user loses their principal. This is a Down-and-Out Call Option.

The main drawback is that you have to lock up much more capital than you would by simply buying an option.
But the fascinating part is that Morpho V2 isn’t just a lending protocol, it’s a predictable risk engine.