# Liquidity Vault
### Vault Overview
Drake vaults provide AMM liquidity through an ERC-4626 compliant structure. Vaults accept USDC deposits and issue dUSDC shares representing proportional ownership.
**Core Design:**
* Oracle-aligned pricing (no bonding curve)
* No impermanent loss
* Counterparty to all trader positions
* Automated opposite position taking
**Position Mirror:**
* Trader goes long → Vault goes short
* Trader goes short → Vault goes long
* Net result: Vault holds aggregate opposite to all traders
***
### Share Token Mechanics
**dUSDC Share Price:**
```
Share Price = Total Vault Assets / Total Shares Outstanding
Total Assets = USDC + Unrealized PnL + Accrued Fees
```
**Example:**
```
Initial: $1M assets, 1M shares = $1.00/share
After 30 days: $1.075M assets, 1M shares = $1.075/share
Appreciation: 7.5% in 30 days
```
**Deposits:**
```
Deposit $10,000 at $1.05 share price
Receive: 9,523.81 dUSDC shares
Shares earn immediately, no lock period
```
***
### Revenue Streams
#### 1. Trading Fees (60% to LPs)
**Volume-based earnings:**
```
$10M daily AMM volume × 0.075% fee = $7,500/day
LP share (60%) = $4,500/day = $1.64M/year
On $50M vault = 3.29% APR
```
#### 2. Funding Payments (100% to LPs)
**Largest revenue component:**
```
Long-biased market → Vault receives funding from longs
Short-biased market → Vault receives funding from shorts
Scenarios on $50M deployed:
Low funding (0.01%/8hr): 10.95% APR
Moderate (0.05%/8hr): 54.75% APR
High (0.10%/8hr): 109.5% APR
```
Bull markets typically generate highest funding income.
#### 3. Borrowing Fees (100% to LPs)
**Utilization-based:**
```
Rate = Base Rate (10%) × Utilization
70% utilization on $50M vault:
$35M deployed × 7% = $2.45M/year = 4.9% APR
```
#### 4. Spread Capture (100% to LPs)
**Bid-ask spread on AMM trades:**
```
Oracle: $50,000
Bid: $49,975 / Ask: $50,025
Spread: $25 per BTC
200 BTC daily volume × $25 = $5k/day = $1.825M/year
On $50M vault = 3.65% APR
Dynamic spreads:
Normal: 0.02-0.05%
High volatility: 0.10-0.20%
Emergency: 0.50%+
```
#### 5. Counterparty PnL
**Vault opposite to traders:**
```
Vault PnL = -1 × Trader PnL
Historical trader statistics:
70-80% of traders are net losers
Average trader loses 40% of capital
Expected contribution: 20-40% APR long-term
```
**Variance:**
* Good months: Traders lose, vault gains significantly
* Bad months: Skilled traders profit, vault loses
* Long-term: Fees + Funding exceed trader edge
***
### Withdrawal Process
Two-step redemption:
**Step 1 - Request:**
* Submit redemption request for shares
* Shares frozen during delay
* Continue earning during period
* Typical delay: 24 hours
**Step 2 - Execute:**
* After delay, burn shares
* Receive USDC at current share price
* Delay prevents rapid withdrawals during stress
***
### Risk Factors
**Trader Performance:** If traders consistently profit, vault pays out winnings
**Market Gaps:** Extreme moves may gap past liquidation levels
**Withdrawal Cascades:** Mass withdrawals may force disadvantageous position closures
**Oracle Issues:** Multiple source failures could impact pricing accuracy
---
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