Ethena's synthetic dollar climbs to second place on Base in ninety days

The 25,645% is a fact about the denominator, and the flow data underneath it tells a slower story: about $335.7M of USDe arrived on Base across 90 days, $67M of it in the last 30, which puts the first 60 days near $4.5M a day and the most recent 30 near $2.2M ^[2]. The pace halved while the headline percentage stayed enormous. Roughly one dollar in five of the current $337M has been sitting there under a month ^[1], which matters mostly because none of it has yet met the condition that would test it.

Behind the dollar sits a hedge, not a balance. Ethena holds spot bitcoin and ether against equal short positions in perpetual futures, so the book stays roughly dollar-neutral whichever way crypto moves ^[7], and the yield passed through to sUSDe holders is the funding that leveraged longs pay to the short side ^[8]. That is a price for carrying basis risk, and while longs are paying it is a good price. When they are not, per cryptobriefing.com's account, the strategy turns into a cost cushioned by a reserve fund, and prolonged negative funding could pressure yields and trigger outflows ^[13]. The hedge itself lives on exchanges, spread across venues, where one failure would open a temporary gap in the cover ^[14].

Second place here is a distant one. USDC's roughly $4.25B and USDe's $337M together account for about 91.7% of Base's approximately $5B stablecoin supply, leaving something near $413M for every other issuer on the chain ^[3], and USDC remains about 12.6 times the size of the challenger ^[4]. Base has one dominant reserve-backed dollar and one fast-arriving synthetic one, and the synthetic one is plugged into Morpho, where users post it as collateral, borrow against it and redeploy the proceeds ^[10].

This is probably wrong, but the real exposure worth pricing is that Coinbase, whose chain this is, has put custody and high-yield product integration behind the issuer ^[9], and the money that answered was, on the source's read, yield-hungry DeFi capital ^[15]. Funding could stay positive and the position compounds toward a real share of the float. Or funding turns negative, the reserve fund absorbs it, and holders leave in an orderly way that shows up first as a negative monthly flow number. Or a venue holding the shorts fails and the redemption test arrives while the collateral is levered inside a Base lending market. I would take the middle branch, on the grounds that carry capital leaves the way it came. What would prove that wrong is net inflows above $60M a month continuing through a stretch of negative funding, which would say the money came for the rails and not the yield.