The APY is dynamic and calculated based on the last 5 days of trading volume on Voltage.
Recognize that you will not be rewarded a token for staking as it works with traditional farming mechanisms. 0.05% of the .3% fee that we take on each swap using our DEX is converted from the token in which the fee was collected into VOLT and then sent to the xVOLT staking pool. In order to claim or view the accrued "rewards", you would need to switch to the unstake tab and put in the max value of your xVOLT tokens to see that you indeed receive a higher amount of VOLT tokens for the xVOLT tokens when unstaked - the difference in value of the two amounts is the "reward".
What happens is the ratio of xVOLT to VOLT becomes higher as each one of these "Buybacks" occur. When you unstake your xVOLT you receive more VOLT than you initially staked.