ETH Options Skew Eases vs. BTC as Traders Price Less Downside; Catalysts Build but ETFs Lag

Options markets show softer downside for ETH than BTC, with 90‑day skew near -2.8%/-1.7% vs -4% for BTC. Fusaka, rate-cut odds, and treasury buys help—ETF inflows remain the missing spark.

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December 5, 2025

Ethereum’s options surface is signaling a quieter downside profile than Bitcoin’s. Skew—traders’ preferred read on crash insurance—has tilted less negative for ETH, suggesting hedgers see softer drawdown risk relative to BTC even as broader sentiment stays cautious.

Here’s the readout that matters: ETH’s 90‑day skew sits around -2.8% and, on longer‑dated screens, near -1.7%, versus Bitcoin at roughly -4%. Negative prints still confirm a market that favors puts over calls, but the gap says participants appear more eager to insure BTC than ETH right now. That lines up with price action: Ethereum hovers just above $3,100, off about 2% on the day. Year to date it’s down around 3% versus Bitcoin’s roughly 6% decline. Since October, both have retreated double-digits—Ethereum by about 19% and Bitcoin by roughly 25%.

What’s shifting the vol surface? A cluster of ETH‑specific supports is quietly rebuilding confidence. The Fusaka upgrade went live to improve layer‑2 efficiency. Select treasuries—including entities like BitMine—added ETH, creating a visible buyer on dips. And macro desks are leaning toward a potential December Fed rate cut, which tends to lower the tail risk premium across risk assets. Derivatives desks also note we’re still well off the bullish extremes from early Q4, so this is not exuberance—more a controlled fade in worst‑case hedging.

Short‑tenor positioning backs that story. Put‑call skew on near‑dated ETH briefly flipped positive, a sign traders were paying up for upside protection for the first time since late October. Block Scholes’ risk‑appetite series for ETH looks like it’s bottoming—an inflection that has often preceded sentiment turns. Analysts flag a parallel to May 2025: improving macro, a major network upgrade (then Pectra), and, weeks later, the strongest run of spot ETH ETF inflows.

The hinge today is that last piece. The catalysts are present—tech upgrade, treasury demand, friendlier rates—but sustained inflows into spot ETH ETFs haven’t shown up. Without that consistent bid, options pricing can moderate downside without unlocking the kind of convex rally that dealers must chase. In practice, that leaves ETH’s risk reversal less negative than BTC’s, yet the entire vol surface still priced for caution.

This divergence has a psychological angle too. BTC remains the benchmark macro hedge; when uncertainty flares, hedgers often default to Bitcoin puts before reassessing ETH. ETH, meanwhile, benefits from tangible, protocol‑level improvements that traders can model into cash flows and activity (L2 throughput, fee dynamics), which can compress perceived left‑tail outcomes even before spot demand accelerates. Business buyers like treasuries add credibility to that narrative, but options desks typically wait for ETF flow confirmation before paying higher implieds for calls.

One more wrinkle: retail prediction markets aren’t echoing the pros. On Myriad, users assign Bitcoin a 75% chance of reaching $100,000 before $69,000, while Ethereum gets a 49% chance of tagging $4,000 before $2,500. That optimism split favors BTC on big‑number milestones even as professional options traders are pricing ETH with less downside. When those two worlds diverge, flow tends to decide the winner—right now, ETF prints aren’t yet validating a decisive ETH breakout.

Net result: skew says ETH’s left tail looks softer than BTC’s, thanks to credible protocol upgrades, selective treasury buying, and potential rate relief. But without a persistent ETF bid, the market is content to reduce crash insurance rather than reprice for a full risk‑on melt‑up.