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# Calculation formula

#### Mint collateral ratio：

C-ratio =（Value of Collateralized asset/ Value of Minting asset）*100%
Asset value=Quantity*Multiplier*Price
Quantity of minting nAssets to be opened a position:

#### Increase/Decrease margin：

The amount of collateralized assets that can be withdrawn should be kept above the minimum collateral ratio, and the amount that can be withdrawn should minus the fee.

#### Mint/Burn nAssets：

The quantity exceeding can be extracted from the CDP

#### Auction：

The amount of collateralized assets the buyer may receive based on the discount rate (the amount collateralized by paying the minting assets in the position) :
* The remaining unsold collateralized assets will be returned to CDP's owner.

#### Staking NSDX APR：

Staking NSDX calculates the time-weighted average award for the past 15 days and then annualize:
[Daily NSDX Emission x 365 x NSDX Price x (Pool Weight/Total Pool Weight)]/TVL

#### LP Mechanism：

Opportunity constancy algorithm X *y= K (initial before trading)
Where X and Y respectively represent the quantity of two kinds of assets in the liquidity pool, and K is the opportunity of the two kinds of assets.
If K is kept constant, x increases and y needs to decrease
x*y=k=(x+ΔX)*(y-ΔY)
Considering the Swap fee (assuming that the Swap fee is p%), the formula is:
【x+ΔX*(1-0.p%)】*(y-ΔY)

#### Create a new pool：

Where x0 and y0 are the initial number of pools
Number of LP added for liquidity minting:
Where x+ and y+ are the increments on both sides of the specific pool

#### Burn：

Burn LPtoken to extract asset