Morpho Midnight — Mechanics

Network design

Midnight is not a V2 of Morpho Blue and does not replace it. The Morpho network now has two primitives: Blue for variable-rate, open-term flexibility; Midnight for predictable rate and duration. Capital can earn on Blue while quoting on Midnight.

Morpho Blue vs Morpho Midnight

Morpho Blue

RateVariable

TermOpen-ended

PricingIRM formula

StructureShared pool

Lender setsRisk

Morpho Midnight

RateFixed

TermFixed maturity

PricingOffer orderbook

StructureCredit / debt units

Lender setsRisk + rate + duration

What it is

Fixed-maturity lending markets

Isolated, immutable markets — each with a loan token, collateral config, and a single maturity date. Like Blue, markets are permissionlessly created primitives.

Positions tracked in fungible credit units (lenders) and debt units (borrowers)
Payoff structure like zero-coupon bonds — settle at maturity
Units are tradable before maturity (secondary liquidity)

Two unit types

📜

Credit unit

Lender claim on
repaid loan tokens

↔

📋

Debt unit

Borrower obligation
to repay by maturity

1 debt unit = repay 1 loan token before maturity. 1 credit unit = claim on those repaid tokens.

How rate is locked

P = tick price — USDC paid today per 1 credit unit (each CU redeems for 1 loan token at maturity). Quoted on the offer; not derived after fill.

P = 1 ÷ (1 + r)

Formula details · tick price P · CU / DU sizing

r = APR × (term_days ÷ 365) · term return from quoted APR CU = USDC spent ÷ P · units minted from upfront USDC DU = CU · borrower owes the same unit count APR = (1 ÷ P − 1) × (365 × 86,400 ÷ ttm) · reverse check (ttm in seconds)

Makers quote APR + maturity; the protocol maps that to P. When a taker fills, economics lock — no IRM drift, no utilization surprises.

Example · 100K USDC lend offer · 5.2% · 90 days

A lender signs a lend offer to deploy 100,000 USDC today · 90-day maturity · 5.2% APR on a cbBTC/USDC market. The offer sits in the mempool until a borrower fills it. Capital stays productive until fill — nothing mints until on-chain execution.

CU / DU calculations · 100K USDC · 5.2% · 90 days

Formulas · tick price P

P = USDC paid today per 1 CU (1 CU = $1 USDC at maturity) — quoted on the offer r = APR × (90 ÷ 365) → term return from quoted APR P = 1 ÷ (1 + r) → tick price (~0.9873 = 98.73¢ per $1 face) CU = USDC spent ÷ P → 100,000 ÷ 0.9873 ≈ 101,282 CU DU = CU · APR = (1 ÷ P − 1) × (365 × 86,400 ÷ ttm) reverse check

1 · Unit definition Positions are denominated in fungible units with zero-coupon payoffs. 1 CU = claim on 1 loan token (USDC) at maturity · 1 DU = obligation to repay 1 loan token before maturity

2 · APR → tick price P The maker quotes 5.2% APR and 90 days; the protocol encodes that as P. r = 5.2% × (90 ÷ 365) ≈ 1.28% P = 1 ÷ (1 + 0.0128) ≈ 0.9873 → pay 98.73¢ today per $1.00 due at maturity

3 · USDC deployed → units Offer size = USDC spent at fill (100,000 upfront — not maturity face value). CU = 100,000 ÷ 0.9873 ≈ 101,282 DU = 101,282 (borrower owes the same unit count)

4 · Cash flows Lender: spend 100,000 USDC → hold 101,282 CU → redeem ~101,282 USDC at maturity Borrower: receive 100,000 USDC → owe 101,282 DU → repay ~101,282 USDC Return: 101,282 − 100,000 ≈ 1,282 USDC (~1.28% over 90 days = 5.2% APR)

At fill (today)

Lender · credit units

CU Minted ~101,282

💵 USDC spent 100,000

100,000 ÷ 0.9873 ≈ 101,282 CU · each redeems for 1 USDC at maturity

Borrower · debt units

DU Minted ~101,282

💵 USDC received 100,000

Receives principal today · must repay 101,282 USDC before maturity

At maturity (90 days later)

Lender redeems

CU Burned ~101,282

💵 USDC received ~101,282

settle ↔ 1:1

Borrower repays

DU Cleared ~101,282

💵 USDC repaid ~101,282

Rate and term lock at fill, not when the offer is published. The lender deploys 100,000 USDC upfront and receives more units than dollars spent — the extra ~1,282 USDC at maturity is the 5.2% return. No daily accrual, no utilization drift. Either side can trade units on secondary markets before maturity; hold-to-maturity economics stay fixed.

Offer-based matching (not a pool)

✍️

Maker

Signs offer tree
rate · size · expiry

→publish

📚

Mempool

Offchain orderbook
indexed by router/API

→fill

🎯

Taker

Selects best quote
submits on-chain

→settle

🌙

Midnight

Atomic unit mint/
transfer · rate locked

Ratifiers prove maker intent (EOA signature or on-chain approval)
Partial fills — one offer can be consumed by multiple takers
Consumption groups — one liquidity budget across many offers/markets
Callbacks — source funds only at fill time (capital stays productive until then)

Position lifecycle

Step 1 · Quote

Maker publishes signed offer

Capital not locked — can stay in Blue/Vault until callback fires

Step 2 · Match

Taker fills on-chain

Fixed rate + maturity locked · credit/debt units minted or transferred

Step 3 · Hold (optional)

Trade units on secondary market

Exit before maturity by selling credit units — price reflects remaining term + credit risk

Step 4 · Maturity

Borrower repays · lender redeems

Credit units burned for loan tokens · debt units cleared · or roll via callback to new maturity

Capital efficiency

Quote without locking

Makers don't pre-lock collateral or loan tokens. Offers are conditional — liquidity is sourced via callbacks only when filled.

Lender keeps USDC in Morpho Vault V2 while quoting Midnight
On fill, callback withdraws and migrates atomically
Multi-market offers share one consumption budget

Tenor routing

Off-protocol search layer

The protocol stores offers; routers (e.g. Tenor) search across books, consumption groups, and callback paths to find executable liquidity.

Quote aggregation across maturities and markets
Vault→Midnight migration callbacks
Auto-roll at maturity (ratifier + callback patterns)

Key takeaways

Fixed rate is locked at match, not at quote intent Until a taker fills the offer, economics aren't binding. This differs from depositing into a variable pool.

Units, not share tokens Midnight positions are credit/debt units with zero-coupon payoffs — not ERC-4626 shares. NAV doesn't float with utilization.

Complements Blue Earn variable yield on Blue while quoting fixed rates on Midnight. Same collateral ecosystem, different term structure.

Isolated immutable markets Each market = loan token + maturity + collateral config. No admin parameter changes after creation.

How Ladder uses Midnight

Ladder pools idle pre-positioned USDC from several legal entities, earns variable Blue yield while waiting, then matches into Midnight via Tenor. SeriesVault is the sole lender of record — Midnight sees one address, not five subsidiaries. Fixed rate applies only after a real match; SeriesVault handles per-entity share accounting on top.