Annual Percentage Yield (APY)

The annual percentage yield (APY) is the real rate of return earned on an investment, taking into account the effect of compounding interest. Unlike simple interest, compounding interest is calculated periodically and the amount is immediately added to the balance. With each period going forward, the account balance gets a little bigger, so the interest paid on the balance gets bigger as well.

If you created the stake for 10 years, you will get 40% APY. 1000 DEFT staked today will generate you 1000 * 0.4 = 400 DEFT yearly so at the stake maturing you will get 1000 + 10*400 = 5000 DEFT

However if you scrape interest during 10 years you will break compounding effect and end up getting only 10-40% APY. If you do interest scraping regularly your APY will drop to 10%