The Allure of the 'Internet Bond'
First, let's de-jargonize this. Projects like Ethena offer a synthetic dollar called USDe. Unlike stablecoins such as USDC, which are backed by cash and U.S. Treasury bills sitting in a bank, USDe maintains its $1 peg using a sophisticated financial strategy.
In essence, the protocol takes user deposits (like staked Ether), holds them, and simultaneously shorts an equivalent amount of crypto derivatives on an exchange. This 'delta-neutral' position aims to be immune to price swings; if the value of the held crypto falls, the short position gains, keeping the total value stable. The staked version, sUSDe, is where the yield comes in. This yield is primarily harvested from 'funding rates'—fees that traders pay to hold leveraged positions on crypto exchanges. In bull markets, these rates can be incredibly high, leading to the 20%+ APYs that have drawn billions in capital.
Setting Aside the Wrong Criticisms
When something offers high yields in crypto, minds often jump to the catastrophic collapse of Terra/Luna. That was an algorithmic stablecoin that failed spectacularly. However, the comparison isn't quite right. USDe is fully collateralized by its hedged crypto assets, not propped up by a volatile sister token. Another initial concern was that the model was simply financial alchemy, too complex to be sustainable. While complex, the underlying 'cash-and-carry' trade is a strategy used by hedge funds for decades. The innovation is applying it at scale in a decentralized protocol. Even the headline-grabbing 'depegs', where USDe has briefly traded below a dollar during market stress, are often misunderstood. These are typically secondary market liquidity issues, not a failure of the core backing mechanism. But that doesn't mean the model is risk-free.
The One Thing Critics Nailed: Funding Rates
The real, unavoidable risk that critics correctly identified is the protocol's deep reliance on those funding rates staying positive over the long term. The entire yield engine works because, most of the time, bullish traders are willing to pay a fee to stay 'long' crypto. Those fees are what sUSDe holders receive as yield. But what happens when the market turns bearish? Funding rates can, and do, turn negative. In that scenario, the short positions that Ethena holds must start paying out fees instead of collecting them. Ethena has a safety net—an insurance fund designed to cover losses during periods of negative funding so that stakers don't have to. The critical question, however, is whether that fund is large enough to withstand a prolonged bear market where negative rates persist for weeks or even months. Data shows that while positive funding is the norm, negative periods are inevitable. If the insurance fund were ever depleted, the protocol would have to stop paying yield or, in a worst-case scenario, start eating into its reserves, threatening the entire system. This is the central, non-negotiable risk of the model.
How USD0 Differs (And Why It Matters)
It's important to note that not all new 'dollars' follow this exact model. The headline also mentions USD0, a stablecoin from a project called Usual Labs. Unlike USDe, USD0 is backed 1:1 by tokenized real-world assets (RWAs), primarily short-term U.S. Treasury Bills. This makes it structurally much more similar to traditional stablecoins like USDC. While it also aims to generate yield, its risk profile is fundamentally different. It's not exposed to crypto funding rates but rather to the credit and operational risks associated with holding and tokenizing traditional financial assets. Lumping all new-age stablecoins together misses this crucial distinction. While critics are right about the funding rate risk for USDe, that specific critique doesn't apply to an RWA-backed coin like USD0.
