Emissions Cliffs: What Happens to APY When Rewards End?

By Chanuka Geekiyanage Oct 12, 2026

An emissions cliff is the moment a protocol stops paying reward tokens, and a farm’s headline APY drops to whatever fees or interest are left. The risk is bigger than the number on the dashboard, because the reward token often falls before the program ends and liquidity tends to leave right after it. This article shows how to split an APY into durable and temporary parts, what happened at Uniswap, Anchor, and Aerodrome, and how to decide whether a farm is worth entering before the rewards stop.

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What Happens to APY When Rewards End

Most farm APYs have two parts: a base yield from real activity, such as swap fees or borrower interest, and an incentive yield from newly issued tokens, treasury grants, or reserves.

Take a hypothetical pool showing 40% APY. Say 6% comes from fees and 34% from a reward token. If the token loses half its price during the program, you earn about 23%. When rewards end, you earn about 6%, before impermanent loss.

Base yield can rise after the cliff if capital leaves and volume holds, since the same fees are split among fewer providers. In practice, volume often leaves too, because incentives attract traders and bots as well as depositors.

Yield component	Source	Survives the cliff?
Trading fees	Swap volume	Yes, if volume stays
Borrower interest	Loan demand	Yes, if borrowing stays
Reward token emissions	Inflation or treasury	No
Reserve subsidy	Protocol reserve	Only until the reserve runs out
Bribes from other protocols	Third parties paying voters	Depends on who keeps paying

This split is the idea behind real yield in DeFi: the return someone pays for using the product, not the part printed to attract you.

Three Real Emissions Cliffs

Uniswap: Liquidity Left When UNI Rewards Stopped

Uniswap’s first liquidity mining program ran from September 18 to November 17, 2020. It funded four pools (ETH/USDT, ETH/USDC, ETH/DAI, and ETH/WBTC) with 5 million UNI each. Reported liquidity fell to $1.8B from a $3.3B peak within a day of the program ending.

Estimates vary by data source. Cointelegraph, using DeFi Pulse data, reported a 38% one-day drop, and SushiSwap’s TVL nearly doubled in a week. IntoTheBlock found liquidity fell more than 50% within days. Capital went to wherever rewards were highest, which is what mercenary liquidity means.

Image source: defillama.com/protocol/uniswap

Anchor: A 20% Yield Paid From a Reserve

Anchor offered roughly 20% on UST deposits. When borrower income fell short, it drew on a Yield Reserve that dropped to about $1.2 million on July 13, 2021 before Terraform Labs added $70 million. In 2022, reserves fell as low as $6.56 million, and Terraform Labs announced a $450 million injection.

Deposits far exceeded borrowing, and Anchor cut its yield to 18% in May with a 15% floor. UST lost its peg that same month. A fixed high yield paid from a reserve is a subsidy with an expiry date.

Image source: defillama.com/protocol/anchor

Aerodrome: Emissions With a Fee Test

Aerodrome on Base splits the roles. Liquidity providers earn emissions, while veAERO voters collect fees and bribes from the pools they vote for and control the emission rate. A 4Pillars analysis reports that voters cut emissions from 6.6 million to 4.3 million AERO per week, and by Epoch 128 fees were 1.35x total LP emissions.

That is a third-party claim, so verify current fees and emissions yourself.

Image source: defillama.com/protocol/aerodrome

Protocol	Who paid the yield	What happened at the cliff	Lesson
Uniswap (2020)	UNI emissions from a fixed program	TVL fell sharply within days	Fixed-end programs attract capital that leaves on schedule
Anchor	Borrower interest plus reserve injections	Reserve drained repeatedly, rate cut	A fixed rate hides the subsidy
Aerodrome	Emissions to LPs, fees and bribes to voters	Emissions cut by voters; fees reported above LP emissions	Adjustable emissions plus real fees soften the cliff

How to Evaluate a Farm Before the Cliff

Check these before depositing:

Emission schedule: Find the end date, halving dates, and any vote that can extend or cut rewards.
Reward-to-fee ratio: Compare daily emissions at current prices with daily fees. Fees well above emissions are a good sign.
Reward token liquidity: If you cannot sell the token without moving its price, the displayed APY overstates what you earn.
Base yield source: Confirm real users pay it, not a reserve or new deposits.
TVL history: A jump when incentives launched suggests rented liquidity.
Exit terms: Check lockups and withdrawal delays, since everyone tries to leave at the cliff.

Tokenomics matter too. A token whose only demand is farming rewards faces constant sell pressure, as explained in this guide on how to judge whether a DeFi token has real value. Look for demand that exists without rewards, such as fee sharing or collateral use.

Emissions farming can make sense in two cases:

The base yield alone meets your target, and you sell rewards regularly.
You plan a short, small position and leave before the cliff.

It does not make sense when a volatile reward token is paired with an asset you do not want to hold, or when a stablecoin yield sits far above lending rates with no visible source.

My Take

Underwrite every farm on its base yield and treat emissions as a bonus. If a position only works with rewards, it is a short-term trade, so size it small and set your exit before you enter.

Of the three examples, Aerodrome’s design is the most credible, because voters can cut emissions and fees provide a revenue floor. That holds only while fees stay above emissions. Anchor is the model to avoid, since its yield depended on reserve refills. Beginners should stay away from stablecoin yields well above major lending rates, and advanced users should check the emission schedule and the reward token’s depth first.

Conclusion

When rewards end, APY falls to the part real users pay for, and capital often leaves faster than expected. Uniswap showed how quickly liquidity moves, Anchor showed the danger of a hidden subsidy, and Aerodrome shows one way to reduce emissions while fees carry more of the load.

Decide in advance what yield you need without rewards. The practical next step is to compare fees with emissions for your target pool on DeFiLlama and check how liquid the reward token is.

FAQs

1. How can I tell how much of a farm’s APY comes from emissions?

Look at the fee or borrow APR separately from the reward APR on the protocol dashboard or DeFiLlama. Subtract the reward portion to see what remains if incentives stop.

2. Does APY always drop when emissions end?

Headline APY nearly always drops because the reward portion goes to zero. Fee APR can rise if liquidity leaves and volume stays, but volume often leaves too.

3. Should I sell reward tokens immediately?

Selling regularly reduces your exposure to a token that often falls as farmers sell it. Check liquidity first, because a large sale into a thin market can cost more than the reward is worth.

4. Are lending markets safer than high-emission farms?

They carry less incentive risk because rates come from borrowers, not new tokens. They still carry smart-contract, oracle, and liquidation risk.

5. What is the warning sign of a subsidized stablecoin yield?

A rate far above comparable lending markets with no clear borrower demand is the main warning. Anchor’s roughly 20% on UST, supported by reserve injections, is the clearest example.

References

The Defiant, Uniswap Liquidity Plunges After UNI Rewards End: https://thedefiant.io/news/defi/uniswap-liquidity-plunges-after-uni-rewards-end

Cointelegraph, Uniswap’s liquidity plunges 40% in a day as incentives dry up: https://cointelegraph.com/news/uniswap-s-liquidity-plunges-40-in-a-day-as-incentives-dry-up

The Block, Uniswap’s liquidity mining rewards program ends: https://www.theblock.co/post/84762/dex-uniswap-liquidity-mining-over

Delphi Digital, Anchor runs a surplus after adding bETH: https://members.delphidigital.io/reports/anchor-runs-a-surplus-after-adding-beth

The Block: Terra’s dominant DeFi protocol may need another bailout soon: https://www.theblock.co/article/145450/terras-dominant-defi-protocol-may-need-another-bailout-soon

4Pillars, AERO thesis: Base’s cash cow, Coinbase’s golden child: https://4pillars.io/en/articles/aero-thesis-base-s-cash-cow-coinbase-s-golden-child

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About the Author: Chanuka Geekiyanage

Chanuka is a content writer, editor and contributor at Panaprium, specializing in long-form editorial articles. He conducts in-depth research and produces well-structured, carefully edited content with a strong focus on clarity, SEO best practices, and consistent formatting. His work spans lifestyle, fashion, wellness, and technical topics, and all articles are reviewed and refined to meet Panaprium’s editorial standards.

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