Borrowing Fee

Borrowing Fee Formula

VolFactor: VF (Involved ATR), Clamp [1, 100]

Weighted_Avg_Daily_ATR = (5 * Avg_Daily_ATR%_1_Days + 3 * Avg_Daily_ATR%_7_Days + 2 * Avg_Daily_ATR%_30_Days) / 10
VolFactorATR = Weighted_Avg_Daily_ATR / Daily_Close_price * 1000
VolFactor = VolFactorATR -> Clamp[1, 100]

UnderBorrowingConstantFactor: UBC (Constant Number)

OverBorrowingConstantFactor: OBC (Constant Number)

OverBorrowingLimitFactor: OBL → (Constant Number)

TotalOILimit: TOIL → (Default: 5X of Vault Balance)

TotalVaultBalance: TVB → (Vault Balance)

$$BorrowingFeeAPR: \\z=VolFactor * UnderBorrowingConstantFactor * (LongOI+ ShortOI)/\\ TotalVaultBalance \\Condition:(0< LongOI + ShortOI < TotalVaultBalance * OverBorrowingLimitFactor)$$

$$z=VolFactor * UnderBorrowingConstantFactor * OverBorrowingLimitFactor + \\VolFactor * OverBorrowingConstantFactor * \\(LongOI + ShortOI - TotalVaultBalance*OverBorrowingLimitFactor)/\\ TotalVaultBalance \\Condition:(LongOI + ShortOI > TotalVaultBalance*OverBorrowingLimitFactor)$$

$$BorrowingFeeAPR =Clamp[L, U]$$

Borrowing Fee Rate Per Year:

Currency	VolFactorRange	VolFactorDefault	OverBorrowingLimitFactor	UnderBorrowingConstantFactor	OverBorrowingConstantFactor	Clamp / L→APR	Clamp / U→APR
Group 1: BTC 、ETH	[1,10]	5	5	1/100	2/100	1%	25%
Group 2: ADA、AVAX、BCH、DOT、EOS、ETC、FIL、LINK、LTC、TRX、XRP、BTC(USDC)	[5,25]	10	5	2/100	4/100	10%	50%
Group 3: Top(50)	[5, 50]	20	5	4/100	8/100	20%	100%