There is no free yield — every return has a risk source.
What you will learn
Understand staking and its risks
Explain what DeFi is and its building blocks
Identify the risk behind every yield
How a liquidity pool works
How a liquidity pool works
Risk vs return
Risk vs return
What staking is
Staking locks your tokens to help secure a proof-of-stake network, earning rewards in return. It's like a bond that pays in the network's own token. The reward rate reflects supply inflation and network participation — not free money.
DeFi in one idea
Decentralized finance (DeFi) rebuilds banking — lending, borrowing, trading, insurance — using smart contracts instead of banks. No intermediaries, open to anyone, governed by code. The same risks as traditional finance (credit, liquidity, market) plus smart-contract risk.
💡 Where yield actually comes from
Every DeFi yield has a source: lending pays from borrower interest; liquidity provision pays from trading fees; staking pays from token inflation. If the stated yield is far above the 'risk-free' rate, the extra is compensation for risk you're now carrying.
The risks you're really taking
High yields carry: smart-contract risk (a bug drains the pool), impermanent loss (providing liquidity to a volatile pair), token devaluation (rewards paid in a token that crashes), and rug pulls (the team exits with your money).
💡 The 20% trap
A pool paying 20% APY in a token that falls 50% has a real return of roughly −40%. Always denominate yield in the asset you actually want to keep — usually dollars or BTC — and ask what risk the yield is paying you to take.
The DeFi mindset
The disciplined approach: understand the mechanism, size for the worst case, and assume any yield that sounds too good is paying you to hold a risk you haven't found yet. DeFi is a tool, not a lottery.
❓ Quick check
A 20% APY paid in a token that falls 50% has a real return of roughly:
A) 20%
B) -40%
C) 70%
D) 0%
(1.20 × 0.50) − 1 ≈ −40%.
(Knowledge check — full exam is next)
Key takeaways
Staking = locking tokens for network security, paid in token inflation
DeFi rebuilds banking with code — plus smart-contract risk
Every yield has a risk source; denominate in the asset you keep
📝 Weekly Exam — pass with 80% to unlock next week
10 questions. Review the Deep Dive and courses before attempting.
1. Staking primarily helps a PoS network by:
Staking secures PoS.
2. DeFi is:
Programmable, open finance.
3. Lending yield comes from:
Borrowers pay interest.
4. Liquidity-provider yield comes from:
LPs earn trading fees.
5. Impermanent loss happens when:
LP loss when pair prices move apart.
6. A rug pull is:
Exit scam.
7. A 20% APY token that falls 50% yields roughly:
(1.2 × 0.5) − 1 ≈ −40%.
8. You should denominate yield in:
Measure in your target asset.
9. Smart-contract risk is:
Code bug → loss.
10. A yield far above the risk-free rate is:
High yield = high (often hidden) risk.
Your score: —
🛠 Weekly Project
Audit one DeFi yield's risk sources.
1
Pick one DeFi protocol with an advertised APY.
2
Identify WHERE the yield comes from (fees, interest, inflation).
3
List 3 risks specific to that protocol (contract, token, liquidity).
4
Write one sentence: is the yield worth the risk, in your judgment?