The APY of staking stETH has changed significantly over the last 50 days, as evidenced by the graph from yearn.vision. This is due to a variety of factors, including changes in the base pool (stETH yield + trading fees), CRV/CVX, and reward tokens (LDO). Additionally, the APY numbers on the website are broken down in the tool tip when you hover, so you can see which portion of the APY comes from each factor. This allows you to get a better understanding of the APY and why it may have changed. In order to get a more accurate representation of the APY, you should look at the current, monthly, quarterly, and yearly APYs. This will give you a better understanding of the overall APY and how it has changed over time.
