# Health factor

We compare the total current debt of the token with underlying loans current value and collateral(s) to determine the health.

$$
Hf = \frac{C\_{cv} + LA\_{cv}}{L\_{net}}
$$

where,

$$Hf =$$ Health factor

$$C\_{cv} =$$ Collateral current value in USD

$$LA\_{cv} =$$ Loan account current value in USD

$$L\_{net} =$$ Net liabilities (Original loan + interest) in USD

Note: For on-chain computations, we use USDT as base value to compute values.

Health is monitored at two levels:

1. dToken level: Determines the total health of the protocol for this asset
2. user loan level: Determines health of a user’s individual loan

### **dToken health:**

$$L\_{net} =$$ total value of the debt issued by the contract across the protocol

 $$C\_{cv} = \Sigma\_{1}^{n} C\_{icv},$$ n is the total number of supported collaterals, $$C\_{icv}$$ is the net value of the ith collateral locked.

$$LA\_{cv}$$ unspent loan amounts + Sum (spent loan amounts)

### **User loan health:**

For the above loan discussed, the health factor can be computed as below:

1. **Before partial withdrawl**

   * $$C\_{cv} =$$ 1 ETH \* 100 = 100
   * $$LA\_{cv} =$$ 300 USDC = 300
   * Assuming an interest of 2 USDC accrued,

     $$ $L\_{net} =$ $$ 300 + 2 USDC = 302

So, Health factor $$(Hf) =$$ (100 + 300)/302 = **1.32**

***

2. **Post spend**

$$LA\_{cv}$$ = 3 ETH x $100 = $300

So, Health factor $$(Hf) =$$ (100 + 300)/302 = **1.32**

**Health factor determines if a loan can be liquidated. Read Liquidations for more info.**


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