You hold one dollar stablecoin and want to borrow another, yet a lending pool usually sets your limit for the case where your debt could be any token it lists, volatile ones included. Two coins pegged to the same dollar rarely drift far apart, so some lending protocols offer a separate, higher borrowing limit for assets whose prices move together.
Aave, the decentralized lending protocol, offers that higher limit on its V3 markets as Efficiency Mode, usually shortened to E-Mode. You choose a category of assets that move together in price, and your collateral from that category borrows at the category's higher limits, while liquidation still applies if those prices separate.
What is Aave E-Mode?
Aave E-Mode, or Efficiency Mode, is an account setting on Aave V3 that gives collateral in a chosen category that category's own loan-to-value (LTV), liquidation threshold, liquidation bonus and borrowing permissions. While it is on, you can borrow only the assets the category allows (source: Aave Help, Efficiency Mode).
Loan-to-value is the share of your collateral's value that you can borrow. The liquidation threshold is the higher share your debt can reach before the position can be liquidated. Ordinary Aave borrowing sets both figures per asset, sized for a market where your debt could be any listed token. E-Mode raises the LTV for assets that track each other, such as USD-pegged stablecoins, when your supply and your borrow sit in the same category (source: Aave Docs, Aave V3 Overview).
The change is easiest to see in dollars. In Aave's V3 example, DAI carries a 75% LTV by default, so 10,000 DAI of collateral supports up to $7,500 of borrowing. Inside stablecoin E-Mode category 1, the category's 97% LTV replaces that figure. The same 10,000 DAI then supports up to $9,700 of stablecoin borrowing, DAI included (source: Aave, Aave V3 Technical Paper).
| Setting | DAI without E-Mode | DAI in stablecoin E-Mode |
|---|---|---|
| Loan-to-value | 75% | 97% |
| Borrowing power on 10,000 DAI | $7,500 | $9,700 |
| Assets you can borrow | Any asset the market lists | Assets the category allows |
Those percentages come from a teaching example. Live categories can carry different members and different settings on each market, so read the figures on the market you use before you size a borrow. The trade-off is the same everywhere: a higher limit on correlated collateral in exchange for a shorter list of assets you may borrow while the category is on.
How stablecoin E-Mode works
Stablecoin E-Mode places USD-pegged stablecoins such as DAI, USDC and USDT in one category. You can then borrow one of them against another at a higher LTV, because the collateral and the borrowed asset belong to the same category (source: Aave, Risk Parameters).
In Aave's V3 example, category 1 is the stablecoin category, with a 97% LTV, a 98% liquidation threshold and a 2% liquidation bonus. Settings that tight rest on the peg itself. A stablecoin losing its peg is rare, which is what allows such high collateralization power (source: Aave, Aave V3 Technical Paper). Coins like DAI and USDC normally hold within a few cents of a dollar (source: ethereum.org, Decentralized finance (DeFi)). That keeps the gap between your collateral and your debt small for as long as both pegs hold.
Work the numbers on one position. You supply 10,000 DAI, enter the stablecoin category and borrow 9,000 USDC, which sits under the $9,700 limit. Your health factor is your collateral value times its liquidation threshold, divided by your debt. Here that is 10,000 × 0.98 ÷ 9,000, or about 1.09. The position becomes eligible for liquidation once the number falls below 1 (source: Aave Help, Health Factor & Liquidations).
Now let the peg slip. If the price your position reads for DAI falls to $0.95 while USDC holds at $1, your collateral is worth $9,500 and the health factor drops to about 1.03. At roughly $0.918 per DAI it reaches 1, a fall of only about eight cents. Interest accruing on the USDC debt pulls the same number lower every day the loan stays open.
Lower health factors can be acceptable for correlated pairs such as stablecoins (source: Aave Help, Health Factor & Liquidations). That is why the category limits sit so high, and it is also why the cushion is thin: the whole setting assumes both coins stay near a dollar together. Before you borrow near the limit, decide which collateral price you could live through. Then size the debt so your health factor stays above 1 at that price. Below 1, the Aave liquidation process lets a liquidator repay part of your debt and take collateral at a discount (source: Aave Docs, Aave V3 Overview).
ETH-correlated E-Mode categories
ETH-correlated E-Mode puts ETH and the staking tokens that track it in one category. You can supply staked ETH tokens as collateral and borrow ETH at the category's higher LTV. In Aave's V3 example, three such categories sit side by side, one each for stablecoins, ETH and BTC (source: Aave, Aave V3 Technical Paper).
The members differ by market and have changed with protocol upgrades. Since Aave v3.2, a market can run several ETH categories at once. One might hold wstETH, weETH and WETH while another holds only wstETH and WETH, each with its own LTV (source: BGD Labs, v3.2 Features). Holding one of those staking tokens can therefore give you a different borrowing limit from holding both, depending on the category you choose.
Aave prices a liquid staking token (LST) such as wstETH from an exchange rate. The oracle takes the dollar price of ETH and multiplies it by the exchange rate between stETH and ETH, read from the staking contract onchain. A correlated-asset price adapter also caps how fast that rate may grow (source: BGD Labs, Correlated-asset price oracle). Your ETH debt uses the same dollar price of ETH, so a move in ETH against the dollar shifts both sides of the position together. What moves your health factor inside the category is the exchange rate the oracle reports.
That reported rate is where the risk sits. On March 10, 2026, a misconfigured price cap on Aave's Ethereum Core and Prime markets reported a wstETH exchange rate below the market rate. The 2.85% drop in the rate the protocol used led to "erroneous liquidations in E-Mode positions", about $26 million of wstETH across 34 accounts (source: The Block, Aave suffers oracle glitch). Take a position with wstETH worth 10 ETH against 8 ETH of debt, a collateral-to-debt ratio of 1.25. The same 2.85% cut leaves about 9.72 ETH of collateral and a ratio near 1.21, with ETH unchanged against the dollar.
The exchange rate is also where an ETH-category position earns. For wstETH that rate grew by 3% to 5% a year in the one to two years before January 2024 (source: BGD Labs, Correlated-asset price oracle). Your ETH debt pays the ETH borrow rate, but the debt is smaller than the collateral. In the position above, equity grows while the yearly growth on 10 ETH of wstETH beats the yearly interest on 8 ETH of debt. Once the interest is larger, your equity shrinks each day with no price move at all.
A stablecoin category breaks when a dollar peg fails. An ETH category breaks when the exchange rate, or the oracle that reports it, separates from ETH. Size an ETH-category borrow with room for that kind of move, and follow governance posts on the oracle settings for your collateral as closely as you watch ETH against the dollar.
Collateral outside the active E-Mode category
Turning on E-Mode leaves the rest of your collateral in place. In a category that is not flagged as isolated, any asset you supply can still back your position. Only the assets your category lists as collateral get its LTV and liquidation threshold, and every other asset keeps its ordinary settings (source: BGD Labs, v3.2 Features).
Aave v3.7 added a flag that marks a category as isolated. Inside an isolated category, only the category's own collateral counts toward borrowing power. Every other supplied asset is treated as LTV 0, so it backs no new borrow, yet it still counts toward your health factor. You also cannot switch on collateral from outside the category while you are in it. Existing categories stay non-isolated unless governance sets the flag (source: Aave DAO, Isolated eMode, Aave v3.7).
The same split runs through your health factor and any liquidation. The category's liquidation threshold and liquidation bonus apply only to category collateral. Assets outside it are weighted with their normal figures (source: BGD Labs, v3.2 Features). One account therefore carries two sets of parameters at the same time.
| Collateral while E-Mode is on | How it counts toward borrowing |
|---|---|
| Category collateral | Category LTV, liquidation threshold and liquidation bonus |
| Collateral outside the category | Its ordinary LTV and liquidation threshold; LTV 0 in an isolated category |
| Supplied asset with collateral switched off | Earns supply interest and adds no borrowing power |
Here is how the two sets combine on one account in a non-isolated category. You hold 10,000 DAI as category collateral at the example's 97% LTV. You also hold $6,000 worth of a volatile token outside the category at an ordinary 75% LTV. Your borrowing power is $9,700 plus $4,500, or $14,200, and you borrow $13,000 of stablecoins. If the volatile token halves to $3,000, its share drops to $2,250 and your limit falls to $11,950. The $13,000 debt now sits above that limit. Even at a 100% liquidation threshold on the volatile token, your health factor would be ($9,800 + $3,000) ÷ $13,000, or about 0.98. It falls below 1, so the position can be liquidated, while the stablecoin side has not changed at all.
In a mixed account, the category side can look comfortable while losses on the ordinary collateral push the whole position toward liquidation. If you want the account to behave like a pure stablecoin position, switch collateral off for the volatile asset before you borrow, or keep enough distance from your limit to absorb its swings.
Borrowing rules inside an active E-Mode
While E-Mode is on, you can borrow only the assets your category marks as borrowable. The protocol checks your loans whenever you enter, switch or leave a category. Every asset you owe must be borrowable in the new category, with your health factor at 1 or above after the change (source: BGD Labs, v3.2 Features).
Those checks turn into four practical rules for an open position:
- Entering a category. Every open borrow has to be on the category's borrowable list. An open WETH loan blocks entry to a stablecoin-only category until you repay it. An isolated category also refuses entry while any collateral from outside it is switched on (source: Aave DAO, Isolated eMode, Aave v3.7).
- Borrowing inside the category. Each new borrow is checked against that list. An asset can be borrowable in E-Mode only if it is also borrowable on the ordinary market.
- Switching categories. All current debt has to be borrowable in the new category, and the health factor must still be at 1 or above under the new settings.
- Leaving E-Mode. Category 0 is ordinary borrowing with no E-Mode rules, and you can return to it only if your health factor stays at 1 or above under ordinary parameters. Since v3.2 that check also runs on your first entry from category 0, a step older versions skipped (source: BGD Labs, v3.2 Features).
Plan the exit before you need it. A position that is comfortable at a 97% category LTV can fail the exit check at ordinary settings. Repay part of the debt or add collateral first, and only then switch back to category 0.
Interest accrues on your debt the whole time a category is active. The rate on that debt follows utilization, the share of a pool's supply that is lent out at a given moment. Under the Aave interest rate model, rates rise faster once utilization passes an optimal point (source: Aave Docs, Aave V3 Overview). A larger borrow made possible by E-Mode carries a larger interest bill, and that interest is added to your debt, which lowers your health factor a little every day.
Liquid eModes in Aave v3.2
Liquid eModes, introduced in Aave v3.2, let one asset belong to several E-Mode categories at once, and you choose which category to enter. Before that upgrade, each asset belonged to exactly one category, which limited a market to one grouping per token (source: BGD Labs, v3.2 Features).
Each category now marks every member as collateral, as borrowable, or as both. A category holding wstETH and WETH can make wstETH collateral only and WETH borrowable only (source: BGD Labs, v3.2 Features). That makes the category a way to borrow ETH against staked ETH while the staking token itself stays off the borrowable list.
A newly created category starts with empty lists. Each asset has to be added as collateral and, separately, as a borrowable asset. An asset must also be collateral or borrowable on the ordinary market before a category can use it that way (source: BGD Labs, v3.2 Features). E-Mode therefore raises the limits on assets a market already accepts and adds none that the market has not listed.
| Liquid eMode feature | What it means for your position |
|---|---|
| Membership in several categories | The same token can appear in more than one E-Mode option |
| Collateral and borrowable flags | A category can accept a token as collateral only, as a borrow only, or both |
| Empty starting lists | Each asset joins a new category one flag at a time |
For you, liquid eModes mean the category menu can list several options that include the same token, each with different partners and different limits. Compare the categories that contain your collateral, then pick the one whose borrowable list includes what you want to borrow and whose LTV fits the size of the loan you plan.
Who sets E-Mode categories and parameters
Risk admins and the pool admin, both chosen by Aave Governance, can configure up to 255 E-Mode categories with their own LTV, liquidation threshold and liquidation bonus (source: Aave, Risk Parameters). Aave Governance is the community of AAVE, stkAAVE and aAAVE holders on Ethereum (source: Aave Docs, Governance).
| Parameter | What it controls on your position |
|---|---|
| Category LTV | How much you can borrow against category collateral |
| Liquidation threshold | How far your debt can grow before liquidation |
| Liquidation bonus | The discount a liquidator receives on your collateral |
| Collateral and borrowable lists | Which assets the category accepts on each side |
Onchain votes on proposals are cast with AAVE, stkAAVE or aAAVE. Stewards also hold delegated control over specific protocol parameters, which lets the DAO respond to market changes without a full vote each time (source: Aave Docs, Governance). That is why the figures on a market can move while your position stays open. The parameters on the market screen always outrank a written example.
If following those votes makes you want exposure to the AAVE token itself, BloFin offers another way to trade it. AAVE/USDT Spot buys the token, and the AAVEUSDT Perpetual is a perpetual futures contract on its price. A position on an exchange is a separate decision from any E-Mode loan you run onchain, and it carries price risk of its own.
Before you place an order on either market, check the maker and taker rates for your tier on the BloFin fee schedule. A trading fee on the token is separate from any interest your Aave loan accrues.
E-Mode on Aave V3 and Aave V4
On Aave V3, you switch E-Mode on for your position in a market. Aave V4, live on Ethereum since March 30, 2026, runs it as E-Mode Spokes for holders of a price-correlated token who borrow the asset that token follows (source: Aave Labs, Aave V4 is Live on Ethereum).
A Spoke is the part of Aave V4 that you supply to and borrow from. Each Spoke connects to a shared Liquidity Hub and sets its own rules for collateral, risk and liquidation. The Hub holds the assets, so capital supplied through one Spoke can be lent through every Spoke connected to that Hub. Aave Pro, the V4 interface, shows the health factor, risk premium and rates for each position. V4 launched with conservative supply and borrow caps that the Aave DAO plans to raise (source: Aave Labs, Aave V4 is Live on Ethereum).
Running E-Mode as its own Spoke isolates its risk, because each E-Mode Spoke is configured and managed independently with settings written for one group of correlated assets (source: Aave Labs, Understanding Aave V4's Architecture). On V3, the category sits inside a market's shared pool, and switching it on changes the rules for the account you already have.
Aave V3 keeps running on Ethereum and other major networks beside V4 (source: Aave Docs, Aave V3 Overview). Check which version a market belongs to before you assume E-Mode works as a setting on your existing account. V4 also changes how liquidity is pooled, one of several differences between Aave V3 and V4 that reach well beyond E-Mode.
| E-Mode feature | Aave V3 | Aave V4 |
|---|---|---|
| Where E-Mode lives | A category inside a market | Its own E-Mode Spoke |
| How you use it | Switch a category on for your account | Supply to and borrow from that Spoke |
| Where the liquidity sits | The market's pool | A Liquidity Hub shared by connected Spokes |
| How risk is set | Category parameters inside a shared market | Each Spoke configured and managed on its own |
How E-Mode fits with ordinary Aave borrowing
E-Mode changes the limits on one part of an ordinary Aave V3 borrow and leaves the rest of the position working as before. You still supply to the same pool, pay interest on the same debt and face liquidation when your health factor falls below 1, so every ordinary risk check still applies to the account.
That makes E-Mode easiest to learn on top of how Aave works at the base level. Suppliers fund a shared pool, borrowers post collateral, and price oracles feed the health factor. You borrow on Aave with the same supply, borrow and repay steps whether or not a category is active, and the only extra step is choosing the category before you draw the loan.
E-Mode used to work in the opposite direction from Aave Isolation Mode. Before v3.7, that V3 feature let newer or more volatile assets back borrowing of only an approved set of assets, up to a debt ceiling (source: Aave Docs, Aave V3 Overview). Aave V3 removed Isolation Mode and debt ceilings in its v3.7 upgrade, which governance completed in May 2026 (source: Aave Governance, Upgrade Aave instances to v3.7 Part 2). Riskier collateral is now limited through E-Mode categories, LTV 0 settings and supply and borrow caps on each asset (source: Aave DAO, Aave v3.7: Isolation Mode & Siloed Borrowing Removal).
Use E-Mode when your collateral and your debt genuinely track each other and you understand what would break that link. Stay with ordinary borrowing when you need assets outside the category or plan to rely on volatile collateral for most of your borrowing power.
Looking to trade AAVE tokens on BloFin? To get started, you'll need to first create a BloFin account, fund your account with cryptocurrency, then open the AAVE/USDT Spot trading page or the AAVEUSDT Perpetual page.
Frequently asked questions
Does E-Mode use a separate price oracle?
Each collateral coin in a category is valued at its own oracle price. The original V3 design let a category carry an optional custom price oracle next to its risk settings (source: Aave, Aave V3 Technical Paper). Aave v3.2 then removed that category oracle, which had never been used, to save gas on storage. A depeg in your collateral coin therefore reaches your health factor at that coin's own oracle price, with no shared category price to soften the move (source: BGD Labs, v3.2 Features).
What happens to my loan if an asset stops being borrowable in my category?
Your existing loan stays open if governance turns off borrowing for an asset in your category after you borrowed it, and the position remains intact. You simply cannot increase that exposure, so a new borrow of the asset is refused until the setting changes again (source: BGD Labs, v3.2 Features). Interest keeps accruing on the debt you already hold, and the other category rules still apply. A change like this comes from Aave Governance or the admins it appoints, so it pays to read proposals that touch your category before they pass.
Can I turn on E-Mode directly through the smart contracts?
The Aave smart contracts record your E-Mode choice against your address (source: BGD Labs, v3.2 Features). You can enable or disable it through the Aave Labs interface or by calling the contracts directly from another tool (source: Aave Help, Efficiency Mode). Whatever tool you use, review the category's assets, collateral list and borrowing parameters first. The transaction changes which assets you can borrow as soon as it confirms, and every position your address holds in that market then follows the category you picked.
How much of an E-Mode loan can be liquidated at once?
A liquidator can repay up to half of your total debt in one go while your health factor stays above 0.95 and both your collateral and your debt are worth at least $2,000. At 0.95 or below, or on smaller positions, the whole debt can be cleared. A partial liquidation also has to leave $1,000 or more in both collateral and debt (source: Aave Help, Health Factor & Liquidations). These limits apply to E-Mode accounts too, and a category loan near its limit can slide from 1 to 0.95 on a small price move.
Does E-Mode change the interest I earn on supplied assets?
Your supply interest is set by the market and stays the same in or out of a category. Suppliers earn from the interest borrowers pay, net of the reserve factor, which is the share of that interest the protocol keeps (source: Aave Docs, Aave V3 Overview). What E-Mode changes is how much you can borrow against your supply. A bigger loan adds interest cost on the debt side, while your supply rate stays wherever the market's utilization puts it.
Can I supply other assets while using isolated E-Mode?
You can supply an asset outside the category and leave it as a deposit without enabling it as collateral. For example, an account already in an isolated ETH category can supply LINK, but a request to enable LINK as collateral fails if LINK is outside that category's collateral list. The deposit and the collateral permission are separate, so supplying the asset does not give it borrowing power in the isolated category (source: Aave DAO, Isolated eMode, Aave v3.7).
Researched and written by the BloFin Academy editorial team with AI-assisted drafting. Primary sources include the Aave V3 Technical Paper, Aave Docs on the V3 overview and governance, Aave Help guides on Efficiency Mode and on health factor and liquidations, Aave's risk-parameters framework, BGD Labs' Aave v3.2 features documentation and correlated-asset price oracle proposal, the Aave v3.7 governance proposal and Aave DAO's v3.7 notes on isolated E-Mode and the removal of Isolation Mode, The Block's report on the March 2026 wstETH oracle incident, Aave Labs' posts on the V4 launch and V4 architecture, and ethereum.org's DeFi overview. All facts independently verified against cited documentation current as of October 2026.
This article is for informational and educational purposes only. It is not financial, investment, trading, or legal advice. Cryptocurrency can lose value. Borrowing on Aave can lead to liquidation if the health factor drops below 1. Spot AAVE/USDT buys the token. An AAVEUSDT Perpetual is a contract on the price. Do your own research. Consider your circumstances before using any protocol or trading any asset.