Daily Premium

The Daily Premium shall be paid between short and long options as followings:

TO Earn with Short Option

For example, if there are 10 options short overall and someone is long only 3 of them. In that case, 7 are Balanced by LP on Uniswap.

Premium/ShortOption=(7FeeUniswap+3Premiumlong)10Premium / Short Option = \frac{(7*Fee_{Uniswap} + 3 * Premium_{long})}{10}

Long Option with Paying Premium​

It is calculated from the followings:

(Note:The following may require mathematical verification.)

  • InterestingRateInteresting Rate from LPT lending based on Aave

  • PremiumTheoreticalPremium_{Theoretical}, calculated from FeeUniswapFee_{Uniswap}

Premiumlong=TimeElapsedInterestingRateValueLPT+PremiumTheoreticaltwhere,ValueLPT=2LxLpaLxpb・・・(1)L=xy,Pa=1.0001lowerTick,Pb=1.0001upperTick,\begin{align*} Premium_{long} &=Time_{Elapsed} * \frac{InterestingRate*Value_{LPT}+Premium_{Theoretical}}{t}&\\ &where,Value_{LPT}= 2L\sqrt{x}-L\sqrt{p_a}-L\frac{x}{\sqrt{p_b}}・・・(1)&\\ &L = \sqrt{xy}, P_a =1.0001^{lowerTick} , P_b=1.0001^{upperTick}, &\\ \end{align*}

InterestingRateInterestingRate

The determination of interest rates refers to the Aave Protocol approach. It is basically proportional to the Utilization Ratio, but the slope becomes steeper above a certain Utilization Ratio.

InterestingRate=InterestingRatebase+UUoptimalSlope1 (U<Uoptimal)=InterestingRatebase+Slope1+UUoptimal1UoptimalSlope2 (UUoptimal)where,U=UtilizationRatio\begin{align*} InterestingRate&=InterestingRate_{base}+\frac{U}{U_{optimal}}Slope_1\ (U<U_{optimal})&\\ &=InterestingRate_{base}+Slope_1+\frac{U-U_{optimal}}{1-U_{optimal}}Slope_2\ (U≥U_{optimal})&\\ &where, U= UtilizationRatio&\\ \end{align*}

PremiumTheoreticalPremium_{Theoretical}

(1)(1) and approximate formula x(1eσ28)xσ28\sqrt{x}*(1-e^{-\frac{\sigma^2}{8}})\risingdotseq \frac{\sqrt{x}\sigma^2}{8} from the discussion, ValueLPT/LValue_{LPT}/Land B are calculated.

vL=2xPaxPbPremiumTheoretical/L=2xσ28=xσ24where,L=xy,Pa=1.0001lowerTick,Pb=1.0001upperTick\begin{align*} &\frac{v}{L}=2\sqrt{x}-\sqrt{P_a}-\frac{x}{\sqrt{P_b}}&\\ &Premium_{Theoretical} / L =2 * \frac{\sqrt{x} \sigma^2}{8}=\frac{\sqrt{x}\sigma^2}{4}&\\ &where, L = \sqrt{xy}, P_a =1.0001^{lowerTick} , P_b=1.0001^{upperTick}&\\ \end{align*}

σ2=VarianceL \sigma^2=Variance_{L} is determined by FeeUnisawpWholeFee_{UnisawpWhole}, FeeLPTFee_{LPT} and the Aave Protocol approach as follows:

VarianceL=VarianceAavePrototocolApproachFeeLPTFeeUnisawpWholeVarianceAavePrototocolApproach=BaseVariance+UUoptimalSlope1 (U<Uoptimal)VarianceAavePrototocolApproach=BaseVariance+Slope1+UUoptimal1UoptimalSlope2 (UUoptimal)where,U=UtilizationRatio \begin{align*} &Variance_{L}=Variance_{AavePrototocolApproach}*\frac{Fee_{LPT}}{Fee_{UnisawpWhole}}&\\ &Variance_{AavePrototocolApproach} = BaseVariance+\frac{U}{U_{optimal}}Slope_1\ (U<U_{optimal}) &\\ & Variance_{AavePrototocolApproach}= BaseVariance +Slope_1+\frac{U-U_{optimal}}{1-U_{optimal}}Slope_2\ (U≥U_{optimal}) &\\ &where, U= UtilizationRatio&\\ \end{align*}

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