# APY And Reward Calculations

Every Dual Currency Investment (DCI) vault offers yield to the Vault Subscribers. For any given vault, the Vault Creator (eg; Liquidity Provider) sets the yield percentage for the vault. This percentage is then used to determine the Annualised Percentage Yield (APY).

The APY formula is:

`Yield / (Expiry Date - Today ) x 365`

The Reward formula is:

`Subscription Amount * Yield`

The following summarises the calculation of the total amount the Vault Subscriber will receive based on the Vault Direction and Linked Price outcome.

#### **Buy Low (ETH-USDC)**

In a Buy Low vault, the Vault Subscriber deposits USDC. There are two possible scenarios at the Expiration Date:

* Linked Price is reached = Vault Subscriber receives ETH at the Linked Price + yield in ETH:

`Subscription Amount / Linked Price * (1 + Yield) ETH`

* Linked Price is not reached = Vault Subscriber receives his initially deposited USDC + yield in USDC:

`Subscription Amount * (1 + Yield) USDC`

#### **Sell High (ETH-USDC)**

In a Sell High vault, the Vault Subscriber deposits ETH. There are two possible scenarios on the Expiration Date:

* Linked Price is reached = Vault Subscriber sells ETH at the Linked Price and receives USDC + yield in USDC:

`Subscription Amount * Linked Price * (1 + Yield) USDC`

* Linked Price is not reached = Vault Subscriber receives his initially deposited ETH + yield in ETH:

`Subscription Amount * (1 + Yield) ETH`
