Stable Vaults is the final piece of Aave’s push toward mass commercialization

Author: Thejaswini M A

Translation: Saoirse, Foresight News

The most expensive thing in front of people is what requires them to make their own decisions. By comparison, the cost of transaction fees is hardly worth mentioning. People are willing to pay for peace of mind and convenience—nothing more.

That is exactly the platform’s harvest logic: remove the burden of decision-making for users. In Tim Wu’s book Age of Extraction, there’s a phrase I particularly like—“passive restraints.” Platforms accomplish extraction by stripping users of their right to choose independently.

Not sure how to pick stocks? No problem—index funds, the S&P 500, will handle it for you. Can’t understand lending products? Then just rename them, wrap them as savings accounts, and launch heavy promotion. At their core, they are charging a “peace-of-mind service fee”: saving users from having to think about decisions, and sometimes even taking away the excess returns that should belong to users—while the public doesn’t seem to care.

Conventional DeFi does the opposite: it piles up a large number of complex choices for users—which blockchain to choose, which liquidity pool, how real-time interest rates work, when to move funds, whether cross-chain bridges have hidden security risks, and even whether the page is an official platform or a fake phishing site generated with Claude prior to July 12. Aave spent six years building up only 2.5 million users, while the ultra-simple-operation Revolut has 65 million users. So it’s not an overstatement to say Aave needs to align with ordinary users’ needs and optimize the user experience.

From January to July this year, Aave’s USDC pool’s annualized interest rate swung sharply between 2% and 9%. Interest-rate fluctuations are simply a DeFi norm: users watch yields rise and fall, and move funds to where returns are higher. But this model simply cannot be pushed to the general public. Emerging digital banks can’t explain to users that deposit yields are determined by market borrowing demand and could drop straight to 2% one day. Users won’t hand their funds to products filled with uncertainty—and that’s also the core reason why most people never touch crypto wealth-management applications.

On July 9, Aave Labs launched a solution—Stable Vaults. This article breaks down how it works, who benefits from it, and why ordinary users will use the product even when they know the cost.

Stable Vaults: How it works

Any enterprise only needs to complete a one-time integration to launch savings deposit services. Eligible entities include digital banks, crypto wallets, and payroll service providers. Ultimately, the funds deposited by users flow into Aave’s lending market. Users only need to check the earnings in the everyday app they use; if they think it’s worthwhile, they can participate directly.

The core feature of the vault: fixed yield, which is extremely rare in the crypto industry. The underlying lending pool’s yield in Aave moves in real time with market borrowing demand. Stable Vaults is like adding a buffer layer on top of that underlying layer, giving the operator the right to adjust interest rates. The operator customizes the interest rate shown externally—for example, setting it at 4%. After that, regardless of how the underlying Aave market interest rate fluctuates, the vault will consistently pay users 4% annualized. All profit-and-loss risk caused by interest-rate volatility is borne by the operator. Any difference between underlying yield and 4% belongs entirely to the operator.

From the deposit user’s perspective

Users effectively receive “yield protection.” When, in spring this year, the Aave USDC pool interest rate fell to 2%, the vault still honored the promised 4% annualized in full, with the operator covering the interest-rate gap.

In financial markets, shifting risk always comes at a price—and this is no exception. A useful analogy is fixed-rate mortgages: compared with floating-rate mortgages, fixed-rate ones are usually 50 to 100 basis points higher. That premium is the cost borrowers pay in exchange for earnings certainty.

Using the vault, users don’t need to build their own crypto wallet, manage seed phrases, operate cross-chain transfers, or filter blockchains. The platform provides human customer service, account recovery, and facial-ID login services. If assets have any issues, a real-world enterprise handles the integration as well. The Aave official app is SOC 2 certified and supports two-factor verification—services that ordinary users are truly willing to pay for.

But users also pay a corresponding cost: there is a yield cap. When the underlying pool’s yield rises to 9% or 6%, users still only receive the 4% fixed rate set by the operator. The operator sets differentiated fixed interest rates based on users’ membership tiers. Floating rates allow users to see the market’s real yield directly, while fixed rates completely conceal the spread the intermediaries earn.

At the same time, users take on an additional counterparty risk. This model adds two new categories of risk on top of fund safety. First, the operating and financial condition of the operator itself. Second, vulnerabilities in private script code used to manage and route funds in the background. If users deposit directly into Aave natively, they only bear the protocol’s underlying code risk. But when using a vault, even if the Aave protocol itself has no vulnerabilities, if the operating enterprise goes bankrupt or a back-end script error causes fund transfers to be lost, the user’s assets will also be harmed.

In traditional interest-rate swap markets, thorough pricing by both supply and demand brings fixed rates back into a reasonable range. But under the Stable Vaults model, the interest rate is set unilaterally by the operator, and users lack an avenue for side-by-side comparison. Users won’t compare the true yields of 4% versus Aave’s underlying 6%. Instead, they benchmark against traditional bank deposits: the Aave official page displays its interest rate alongside the nationwide average savings rate of 0.4% calculated by the U.S. Federal Deposit Insurance Corporation (FDIC). With these paired together, vault returns appear quite attractive.

Source: aave.com

From the operator’s perspective

For example: a digital bank holds 200 million USD in idle stablecoins. The customer acquisition cost has long been spent. All that’s needed is to complete a one-time technical integration to launch Stable Vaults, then advertise a 4% fixed annualized rate externally. If the underlying Aave funding pool’s annualized yield is 6%, then every year the operator can generate a $4 million profit purely from the 2% yield spread. That formerly “idle cost” capital deposit is now transformed into a low-input, steady-yield source.

Rise, a payroll settlement provider, is a typical case: it pays salaries to contractors in 190 countries and has processed over $1.5 billion in funds in total. Companies typically pre-fund payroll with USDC a week in advance. That money was idle end-to-end before. Therefore, Rise launched its own wealth-management feature, Rise Earn, temporarily depositing the pre-funded payroll into Aave’s USDC pool on the Arbitrum chain until the payroll distribution date.

Rise charges only 1% of total earnings as a service fee, with no other deductions. From the underlying 6% annualized yield, the service provider only takes 6 basis points; the contractor receives 5.94%, while the Aave underlying real-time floating interest rate is displayed throughout.

Meanwhile, with a similarly sized amount of capital operated via Stable Vaults, the operator captures a spread of 200 basis points. The difference in earnings is as high as 33 times.

From the Aave and Stable Vaults perspective

Aave profits by selling tiered vault interest-rate functionality. The operator can set differentiated yields based on membership tiers and marketing campaigns—high-tier members get 5% annualized, ordinary users get 3.5%—all sourced from the same underlying lending pool yield. For fintech companies issuing their own stablecoins, they can also register their own stablecoin as a vault deposit asset, building a closed-loop capital flow system. Steady yields increase user fund retention; and the continuously accumulated assets themselves are a core lever for platform retention.

Operators do not earn the spread out of thin air—they must also take losses in both directions caused by interest-rate volatility. When the underlying pool yield fell to 2% in spring, all vault operators offering fixed rates above 2% had to cover the yield shortfall out of their own pocket.

The event on April 18 this year fully exposed the potential risks of this model: the Kelp DAO cross-chain bridge was hacked, triggering a large-scale run on the Aave fund pool. Pool utilization instantly hit 100%; all withdrawals were frozen. Paper gains on the operator’s books, along with users’ principal, were trapped together in the withdrawal queue.

When fund utilization hits its limit, the vault is unable to withdraw any funds just like ordinary users. Any excess underlying yield can only remain as a bookkeeping surplus, tied together with users’ principal.

If liquidity recovers later, the operator can settle the accumulated bookkeeping surplus all at once after the run-and-freeze period. This surplus is, in essence, a premium the market pays for liquidity shortages. The ones bearing the cost of liquidity freezing are always deposit users. If liquidity cannot recover for a long time and the pool develops bad debt, the vault will experience an earnings shortfall. Aave’s documentation only states that the authorized party can make up for system shortfalls, but it does not establish a corresponding reserve-funded backstop mechanism.

Aave would argue externally that the protocol smart contracts were never broken by hackers; the vulnerability was in the Kelp cross-chain bridge, not its own code, and it froze the risk-collateral asset rsETH within a few hours. These claims are themselves true. But before that, the community vote accepted the high-risk collateral asset, with a dangerously high collateral ratio of 93%. Then the risk负责人 (risk负责人) resigned directly, ultimately forcing ordinary users to bear all losses caused by the system failure.

Stable Vaults appears to complete the final puzzle piece for Aave’s commercialization toward the masses.

Payroll provider Rise channels idle payroll funds into Aave. Crypto exchange Kraken, based on Aave V3, launches a customized protocol Tydro on its own Layer 2 network; all its retail wealth-management features connect to that protocol, meaning Kraken wealth-management users effectively become Aave users indirectly. Cap Finance also stores its stablecoin reserves into the Aave funding pool.

The Horizon platform partners with Circle and Franklin Templeton to support tokenized Treasury collateralized borrowing. The Aave official app directly targets retail users on the C side. Stable Vaults opens integration channels to the whole industry, and packages itself externally as an asset diversification solution.

Aave actually doesn’t lack deposits. Kulechov (Stani Kulechov, founder and CEO of Aave) said in an interview with The Block in March this year that current DeFi market liquidity is overall oversupplied, so the industry focus must shift to the borrowing-demand side—this is also the core reason why the underlying USDC yield has long stayed at 2%-3% and can never return to the previous 8% highs. For a long time, DeFi capital has chased yield relentlessly; even a 50-basis-point yield difference would cause large-scale capital outflows. But when crypto funds—previously extremely unstable—are funneled via applications that control user relationships, such as payroll platforms and wallets, they can transform into a pool of relatively stable “stock” capital like traditional bank deposits.

Aave’s Economics Model 3.0 mechanism, officially launched on June 27, will use protocol revenues to auto-buy back and burn AAVE tokens. No matter whether the market is bullish or bearish, the platform needs stable revenue to support buybacks. In bearish conditions, accumulated deposits with high retention characteristics are the key to ensuring the continuous flow of buyback funds—and Stable Vaults is precisely the tool for acquiring this kind of stored liquidity.

Coinbase’s USDC wealth-management yield is about 4% annualized. On July 1, Robinhood launched wealth-management features, with an annualized yield close to 7%. Both platforms describe their wealth-management products as savings accounts, and Coinbase has accumulated 2.8 million fund accounts.

Coinbase’s underlying integrations are with the Morpho and Ethena protocols. Robinhood builds its wealth-management system on Morpho and Maple, with risk-control parameters set by a third-party firm, Steakhouse.

Both of these platforms invest significant costs to build the entire wealth-management system, including custody partnerships, asset selection, risk-control teams, and months of legal workflows. And the core value of Aave Stable Vaults is that it eliminates all self-built costs: any application only needs a one-time integration to display a fixed return number to users. The profit-and-loss spread between the underlying Aave pool’s yield and the fixed-rate shown on the front end is handled entirely by the integrator itself.

Traditional banks can legally run deposit-and-lending businesses, supported by a century of mature legal infrastructure: reserve requirements, regular on-site inspections, deposit insurance, and regulators’ ability to conduct unannounced inspections on-site. The root cause of the regulatory system’s existence is a social consensus: banks will lend out depositors’ funds, so there must be comprehensive mechanisms to address the risk of lending defaults.

All wealth-management functions that Stable Vaults can provide can be achieved by ordinary users themselves in just 20 to 30 minutes: create a crypto wallet, transfer USDC stablecoins, then deposit into the native Aave lending pool. Self-directed operations do not require KYC identity verification, don’t involve middle operators and back-end rebalancing scripts, don’t extract the yield spread, allow users to keep the full 6% yield, and also let them view all funding-pool data in real time.

I understand that the platform’s considerations are far more long-term than ordinary users’ short-term gains or losses. And I also never believe that ordinary people choosing the vault product lack judgment.

Research by Iyengar and Huberman on retirement wealth-management plans shows that the more fund products are available, the lower the proportion of users who actively participate in wealth management; when faced with an overwhelming number of choices, most people simply give up on managing their money. After that, all consumer finance products aimed at the general public kept the same design logic and conclusions from that research.

Over the past 15 years, the industry has repeatedly promoted the security of self-custody crypto wallets—but the market’s real choices are the opposite: the vast majority of card-spending transactions on-chain still go through custody platforms. This is the true preference validated long-term by massive users; custody platforms’ security logic fits ordinary people more closely. For beginners with only $2,000 in assets and no knowledge of crypto, the two most common scenarios where assets are lost are losing seed phrases and entering transfer addresses incorrectly. Custody apps with face ID and account-recovery functions directly eliminate these types of human error risks. Users pay the 200-basis-point spread in essence to purchase protection against their own operational mistakes—that is a completely rational consumer decision.

Therefore, when Aave launches Stable Vaults, it’s the right and commercially logical move. For DeFi protocols that have massive liquidity but lack user loyalty, this is the inevitable choice. In the crypto industry, all applications aimed at ordinary consumers are iterating in the same direction, because underlying human nature logic is everywhere.

At bottom, this product is an acceptance of human nature: ordinary people pursue asset safety and predictable returns, and most importantly, simple and convenient operation. Managing personal assets already consumes a lot of effort; no one wants to personally run a private central-bank-style wealth-management system again. Users just want to close the app and see that the account’s earnings numbers stay stable and unchanged.