Ethereum Fusaka Upgrade Is Live: 8× Blob Capacity, Dec 9 and Jan 7 Dates — and Why ETH at $2,270 Hasn't Moved Yet

Ethereum just pulled off its biggest scaling upgrade of the year — and almost nobody noticed. The Fusaka upgrade went live on October 29, 2026, unlocking the path to an eightfold increase in blob capacity and cheaper fees on layer-2 networks. Yet ether still trades at around $2,270, stuck in a market where US spot Ethereum ETFs have just logged 23 straight days of outflows worth roughly $1 billion. The upgrade is real, the dates that follow it matter more than the launch day itself, and the gap between the technology and the price is exactly where the opportunity — and the risk — sits.

Fusaka is Ethereum's second major upgrade of 2026, arriving seven months after Pectra in May. It does not change how ether looks in your wallet, and it does not pay you a yield. What it changes is how much data Ethereum can absorb from the layer-2 chains built on top of it — the networks where most everyday crypto activity now happens. If you use Ethereum through a rollup, hold ether, or stake it, this upgrade reaches you whether you followed it or not. In this guide we explain what Fusaka actually changed, the December 9 and January 7 dates that decide the next phase, the five myths already circulating about it, and what it means for ETH at $2,270. For the staking side of the story, see our complete ETH staking guide.

What the Fusaka Upgrade Actually Changed

Fusaka is a package of 12 Ethereum Improvement Proposals (EIPs), but one idea carries almost all of the weight: PeerDAS, or peer data availability sampling. To understand why it matters, start with how layer-2 chains use Ethereum. Rollups such as Arbitrum, Optimism and Base bundle thousands of user transactions off-chain, then post compressed packets of data — called blobs — to Ethereum for settlement and security. Ethereum nodes verify that data, which is what makes rollups trustworthy without running their own security.

The problem was that every node had to download every blob in full to verify it. As rollup traffic grew, that requirement capped how much data Ethereum could accept: a maximum of 9 blobs per block, with a target of 6. Fusaka changes the verification model. With PeerDAS, each node checks only random samples of blob data instead of downloading the whole set, while the network as a whole still guarantees the data is available. Sampling replaces full downloads, and that is what lets capacity scale without forcing every node operator to buy more hardware.

Alongside PeerDAS, Fusaka fixed a quiet fee bug that had lasted since the Dencun upgrade. The blob base fee had been stuck at 1 wei — effectively zero — for months, which meant blob space was mispriced and the fee market could not signal real demand. EIP-7918 sets a fair floor tied to actual verification cost, with blob fees now moving in a range between 0.01 and 0.5 Gwei. That sounds technical, but it matters for users: a functioning blob fee market means rollups pay a real, predictable price for data, and congestion gets priced instead of silently subsidised.

The package also includes smaller but practical improvements: support for signing transactions with device biometrics such as a phone's facial recognition, and hardening against denial-of-service attacks that try to clog the network with spam. Ethereum Foundation researcher Alex Stokes described the upgrade on an EthStaker livestream as the step that lets layer-2 chains send far more data to Ethereum at lower cost, while Nick Johnson, founder of the Ethereum Name Service, told DL News that PeerDAS should make rollups cheaper and more scalable. The layer-2 economy built on Ethereum is worth roughly $47 billion on-chain, so even small per-transaction savings compound fast.

The Dates That Decide What Happens Next

Here is the part most coverage skips: Fusaka did not instantly multiply Ethereum's capacity on launch day. The upgrade enables a staged rollout, and the capacity increases arrive through two follow-up "blob parameter only" forks that need no client software updates. If you only remember one table from this article, make it this one:

Date	Event	Blob capacity
May 2026	Pectra upgrade goes live (validator staking changes, account abstraction)	6 target / 9 max per block
October 29, 2026	Fusaka activates: PeerDAS, blob fee fix, biometric signing, DoS hardening	Caps unchanged on day one — the mechanism is unlocked
December 9, 2026	First blob-parameter fork (BPO-1)	Target rises to 10, maximum to 15
January 7, 2027	Second blob-parameter fork (BPO-2)	Target rises to 14, maximum to 21
To be announced	Glamsterdam, the next major upgrade (postponed in October, no new date)	Expected to cut mainnet costs further

The December 9 and January 7 forks are the real catalysts for users. Each step raises the ceiling on how much rollup data Ethereum accepts per block, which is what ultimately lowers layer-2 fees and lets new applications launch without bidding for scarce blob space. Developers have said further blob-parameter forks remain on the roadmap beyond January, with exact numbers set from observed network performance. In other words, Fusaka is the foundation, and the next ten weeks are the build-out.

Why ETH at $2,270 Hasn't Moved on the News

If Fusaka is so important, why is ether still trading near $2,270, down sharply from its 2026 highs, while Bitcoin holds around $78,000 with 59.3% market dominance, according to TokenPost market data for November 1? The honest answer is that upgrades do not set prices in the short term — flows and macro conditions do, and both are currently working against ETH.

First, the ETF picture is brutal. US spot Ethereum ETFs have now recorded 23 consecutive days of outflows, with roughly $1 billion leaving the funds — a record nobody wanted, as we covered in our report on the outflow streak. On October 30 alone, $155.7 million left ether funds, alongside $643.2 million from Bitcoin ETFs. Institutional money is leaving faster than the upgrade narrative can attract it back.

Second, monetary policy is restrictive. The Federal Reserve held its benchmark range at 3.75% to 4.00% on October 28 — the same week Fusaka launched — after a 25-basis-point hike in September, and markets are pricing a December hike rather than a cut. With the ECB deposit rate at 2.50% after its own September hike, there is no easy-money tailwind for risk assets right now. Ethereum's recovery path, as analysts note, depends on ETF flow momentum rather than monetary easing.

Third, the market is still digesting the $6.3 billion Binance hack of late October, which froze billions in assets and pushed traders toward Bitcoin and cash. In that environment, a technical upgrade — however significant — struggles to compete for attention with security fears and redemptions. None of this makes Fusaka unimportant. It means the upgrade's payoff arrives on a delay: cheaper rollups attract users and developers over months, not minutes, and the price tends to follow usage with a lag.

5 Myths About the Fusaka Upgrade, Busted

Every major Ethereum upgrade spawns the same misunderstandings. Here are the five already circulating about Fusaka, and what is actually true:

• Myth 1: Ethereum is now eight times faster overnight. Not quite. Fusaka unlocks the path to an eightfold blob-capacity increase, but the capacity itself rises in steps — December 9, then January 7, then further forks. Mainnet transaction speed is largely unchanged on day one; the gains land on layer-2 chains first.
• Myth 2: Gas fees on Ethereum mainnet just dropped to near zero. Mainnet gas is barely affected. Fusaka targets blob fees — the cost rollups pay to post data — not the execution gas you pay for a mainnet swap. Cheaper rollups are the prize, not cheaper mainnet transactions. That job falls to the postponed Glamsterdam upgrade.
• Myth 3: Fusaka raises staking yields. It does not change issuance or validator rewards. Staking yields still depend on network activity and the share of ether staked. Our comparison of Ethereum vs Solana staking in 2026 puts ETH staking yields near 2.63%, against about 6% for SOL — Fusaka moves neither number directly.
• Myth 4: Nodes no longer verify data, so Ethereum is less secure. PeerDAS does not remove verification; it distributes it. Each node samples different random pieces, and the network's sampling guarantees mean missing data gets detected with overwhelming probability. Security comes from the sampling math, not from every node holding everything.
• Myth 5: If ETH didn't rally on Fusaka, the upgrade failed. History says otherwise. Pectra in May and Dencun before it also produced muted immediate price reactions, yet both expanded what Ethereum can do. Upgrades compound; prices react to flows, adoption and macro. Judging Fusaka by one week's candle misses the point entirely.

What Fusaka Means for You

For regular users: expect gradually cheaper and smoother layer-2 transactions from December onward, especially on busy rollups. If you mostly transact on mainnet, you will notice little change until Glamsterdam — and if you are new to crypto entirely, start with our beginner's guide to what to buy first before chasing upgrade narratives.

For ether holders: Fusaka strengthens the investment case for ETH as infrastructure rather than as a trade. More blob capacity means more rollup activity settles on Ethereum, more fees flow to the network, and more applications become economically viable. But the near-term price still answers to ETF flows, the December Fed decision, and whether Bitcoin holds $78,000. Our Ethereum price prediction for 2027 lays out the bull, base and bear cases for where ETH goes from here.

For stakers and node operators: PeerDAS lowers the hardware burden of running a node as data volumes grow, which supports decentralisation — more people can afford to verify the chain. That matters because Ethereum's long-term goal, stated by its developers, is scaling toward 100,000 transactions per second, up from a current maximum of around 30 on mainnet. Fusaka is one checkpoint on that road, not the destination.

For developers: the December 9 and January 7 forks are planning dates. Applications that were priced out of blob space — on-chain games, social apps, high-frequency DeFi — get room to breathe. If you are building on a rollup, the next ten weeks are when your cost assumptions change.

The Bottom Line

Fusaka is the kind of upgrade that matters more in retrospect than on launch day. It went live on October 29, 2026, gave Ethereum the machinery to scale its data capacity in stages, fixed a broken blob fee market, and set up two dated catalysts — December 9 and January 7 — that will show up in real user fees. The market's indifference so far says more about ETF outflows, tight money and post-hack nerves than about the technology. Watch the blob caps rise in December and January, watch whether ETF outflows finally break, and watch the postponed Glamsterdam upgrade for a new date. If all three turn, the upgrade the market ignored in November could be the one it reprices in 2027. If you are just getting started, our complete beginner's guide to Bitcoin explains the foundations this whole ecosystem rests on.

FAQs

What is the Ethereum Fusaka upgrade?

Fusaka is Ethereum's second major upgrade of 2026, activated on October 29. Its headline feature is PeerDAS (peer data availability sampling), which lets nodes verify layer-2 blob data by sampling random pieces instead of downloading everything, enabling large capacity increases for rollups.

When do blob capacity increases actually happen?

In stages. The first blob-parameter fork on December 9, 2026 raises the target/maximum from 6/9 to 10/15 blobs per block. The second, on January 7, 2027, raises them to 14/21. Further forks are planned based on network performance.

Will Fusaka lower my gas fees?

On layer-2 networks, gradually, from December onward — as blob capacity rises, rollups pay less for data and can pass savings to users. On Ethereum mainnet, expect little change; mainnet cost reductions are expected from the future Glamsterdam upgrade.

Does Fusaka change ETH staking rewards?

No. Fusaka does not change issuance or validator rewards. Staking yields depend on network activity and the proportion of ether staked, not on this upgrade.

Why hasn't the ETH price risen after Fusaka?

Short-term prices follow flows and macro conditions, not upgrades. Ether faces 23 straight days of ETF outflows worth about $1 billion, a restrictive Fed stance at 3.75%–4.00%, and post-hack risk aversion. Upgrades affect usage over months; prices follow with a lag.

What is Glamsterdam, and when is it coming?

Glamsterdam is Ethereum's next major upgrade after Fusaka, expected to lower mainnet costs. It was postponed in October 2026 and developers have not announced a new activation date.

Sources: BitRss reporting on the Fusaka activation and blob fee changes; DL News analysis of PeerDAS; TokenPost market data for November 1, 2026; Farside Investors ETF flow tables for October 30, 2026.