I’ve spent quite a bit of time digging into how to really evaluate yields in crypto, and honestly, APY is a concept we see everywhere but rarely understand deeply.

Most people just look at the displayed rate and think it’s good. But APY is much more than that. It’s a measure that takes into account compound interest, that magical thing where you earn interest on your interest. It makes a real difference over time.

So yes, there’s also APR floating around everywhere. But here’s the key difference: APR is just a simple annualized rate, without compounding. APY, on the other hand, incorporates this effect of capitalization. Specifically, if you see an APR of 2% and an APY of 3%, that extra 1% comes exactly from compounding, from your gains being automatically reinvested. That’s why APY really gives a more accurate picture of what you’ll actually earn.

The formula behind it is APY = (1 + r/n)^(nt) - 1, where r is the nominal rate, n is the number of compounding periods per year, and t is the duration. Simple on paper, but in crypto it gets more complex because you have to consider volatility, liquidity risks, and smart contracts.

In practice, you mainly find APY in three contexts. First, crypto lending where you deposit your tokens and receive regular interest based on the agreed APY. Then yield farming, which is more aggressive: deploying your assets across different protocols to chase the best returns. It’s more profitable but also riskier, especially on new platforms. And then there’s staking, where you lock up your crypto on a blockchain network, often in PoS, and earn rewards. It’s generally safer, and APYs can be attractive.

In short, if you really want to compare different crypto investment opportunities, APY is your friend. It gives you a much more complete view than APR. But beware, APY is just part of the puzzle. There’s also market volatility, liquidity risks, your own risk appetite. Every strategy has its traps. So yes, look at APY, but don’t rely on it alone.