This briefing answers the same five questions every week, in the same order, so you can scan the ecosystem in two minutes or read it properly in ten. This edition covers the seven days ending Sunday 13 September 2026.
The value of a fixed frame is comparison: when an answer changes from last week, the change is the story. TVL, volume, stablecoin and fee figures come from DefiLlama's public API; yield levels are recomputed for this specific week from per-pool historical data, so they reflect the week named rather than whatever happens to be quoted today.
Quick answer
What is the one-sentence state of DeFi for 7 - 13 September 2026? Usage finally outran deposits: fees rose 17.4% and DEX volume 8.2% against a 1.2% TVL gain, lifting turnover to 0.60x, while bridge-class failures continued — Chainflip lost 736,442 USDT to memo reuse and two more unbacked-mint incidents hit Nomic and Symbiosis — even as Liquid recovered 3,400 BTC of its stolen reserve.
1 Networks — how active is each chain?
| Chain | TVL | W/W | Fees | W/W | Turnover |
|---|---|---|---|---|---|
| Ethereum | $50.1B | +1.5% | $74.5M | +1.8% | 0.17 |
| TRON | $5.5B | +1.3% | $1.9M | -5.0% | 0.05 |
| BNB Chain | $6.0B | +2.2% | $29.8M | +6.4% | 1.68 |
| Solana | $5.9B | +0.0% | $108.3M | +28.5% | 3.12 |
| Base | $5.6B | -1.1% | $21.6M | +68.8% | 1.18 |
| Arbitrum | $1.4B | -0.7% | $3.3M | +10.0% | 0.80 |
| Optimism | $0.4B | +0.0% | $1.1M | -31.2% | 0.39 |
Ethereum holds $50.1B of tracked TVL — the first weekly close above $50bn in our sample — but the activity headline belongs to Solana: $108.3M in weekly fees, up 28.5%, the largest total we have recorded on any tracked chain, earned on TVL that did not move.
Turnover makes the regime shift legible. Solana turned its TVL over 3.12 times this week, up from 2.72x; Ethereum did so 0.17 times, down from 0.18x. Blended turnover sits at 0.60x — and unlike last week, the average dollar in this sample is being used more, not less.
2 Stablecoins — how are stablecoins performing?
| Chain | Stablecoins | Share | W/W |
|---|---|---|---|
| Ethereum | $147.9B | 51.9% | -0.4% |
| TRON | $94.2B | 33.1% | +0.4% |
| BNB Chain | $16.9B | 5.9% | -0.4% |
| Solana | $16.5B | 5.8% | -1.0% |
| Base | $5.0B | 1.7% | +1.0% |
| Arbitrum | $4.0B | 1.4% | +2.8% |
| Optimism | $0.5B | 0.2% | +0.0% |
Aggregate float across the chains we track stands at $284.9B, down -0.1% week over week — the first contraction in four weeks. TRON added about $400m and Arbitrum roughly $110m; Ethereum lost about $590m, Solana roughly $160m and BNB Chain about $70m.
Float shrinking while volume and fees grow is not automatically bearish — it means the same dollars worked harder. But it bounds the activity: without a fresh injection, growth has to come from velocity, and velocity has a ceiling. The combination to watch for next is fees falling while float keeps sliding.
Concentration is unchanged as a structure: Ethereum and TRON hold 85.0% between them, so this week's small ecosystem decline is essentially an Ethereum story.
3 DeFi — what happened this week?
| Chain | TVL | Share | DEX volume | TVL W/W |
|---|---|---|---|---|
| Ethereum | $50.1B | 66.9% | $8.6B | +1.5% |
| BNB Chain | $6.0B | 8.0% | $10.0B | +2.2% |
| Solana | $5.9B | 7.9% | $18.5B | +0.0% |
| Base | $5.6B | 7.5% | $6.6B | -1.1% |
| TRON | $5.5B | 7.3% | $0.3B | +1.3% |
| Arbitrum | $1.4B | 1.9% | $1.1B | -0.7% |
| Optimism | $0.4B | 0.6% | $0.2B | +0.0% |
The trading picture broadened for the first time in weeks: three of seven chains grew volume — Solana +14.9%, Base +13.8%, BNB Chain +8.6% — against two decliners and two flats. BNB Chain's second consecutive gain carried its weekly volume to $10.00bn, about 16% above Ethereum's, confirming last week's move was more than an episode.
On the risk side, the week extended last week's pattern and added a variant. Nomic double-spent nBTC across IBC (about $3.15m at risk, mostly frozen by Osmosis validators) and Symbiosis minted roughly 46.1 billion unbacked syBTC (about $336k realised) — both the upstream-mint shape Liquid exposed. Chainflip's 736,442 USDT loss was different in mechanism but same in kind: the refund logic paid against a deposit that never left the vault, twice.
The recoveries are the other half of the ledger. Liquid got 3,400 BTC back through a negotiation conducted in OP_RETURN messages; Osmosis froze 22.65 BTC mid-flight; Symbiosis recovered about 15 BTC. Every successful control was some party with the power to stop, choosing to do so quickly. Provenance checks that prevent the mint still do not exist at any of the venues hit.
4 Yields — what is happening in the yield market?
| Strategy | Representative level | Note |
|---|---|---|
| Stablecoin lending, Ethereum | 4.00% | TVL-weighted across all pools |
| Stablecoin lending, Base | 4.52% | L2s currently pay a premium |
| Stablecoin lending, Arbitrum | 4.98% | Highest of the large L2s |
| LST (ETH) | 2.22% | Pure staking; lending collateral excluded |
| LST (SOL) | 4.88% | Nominal yield above ETH staking |
| Blended stablecoin | 3.95% | Across all tracked chains |
| LP (major pairs) | variable | IL risk dominates the outcome |
Ethereum stablecoin lending sits at 4.00% TVL-weighted against a tokenized T-bill reference of 3.32% — a premium of 0.68pp. That answers last week's watch item directly: the premium did not hold above three-quarters of a point, easing from 0.76pp as lending rates slipped.
Solana staking rebounded from 4.41% to 4.88% — recovering most of last week's 0.56pp fall within the noise band we described. One reading is that the disinflation-driven decline was overdone; the honest one is that MEV and tips components swing week to week, and a third data point will say more than the second.
Arbitrum lending extended its premium to 4.98% — a spread of 1.66pp, the widest in the sample — for the same reason as before: a smaller pool set where rates have not been arbitraged toward the reference. Ethereum liquid staking held at 2.22% and the blended stablecoin rate eased from 4.01% to 3.95%.
5 Outlook — what to watch next week
| What to watch | Why | Trigger |
|---|---|---|
| Whether BNB Chain's volume level holds | A second consecutive gain took it 16% above Ethereum | A third week at or above $9bn weekly volume |
| Whether fee growth survives without new deposits | Fees rose 17.4% on a 0.1% float decline | A week where fees fall and float keeps shrinking |
| Solana staking after its rebound | Recovered most of last week's fall, to 4.88% | A decisive break below 4.4% would confirm the disinflation path |
| Ethereum's lending premium | Fell back below the three-quarters-of-a-point mark, to 0.68pp | Two more weeks below 0.7pp would read as a regime, not noise |
| Chainflip restart and compensation | First vault loss in the protocol's history | The restart plan and the make-whole mechanism it names |
The single most informative question is whether fee growth survives without new deposits. A week where float keeps sliding while fees hold would suggest velocity has further to run; a week where both fall would close the usage window as quickly as it opened. The second is Ethereum's premium: one week below 0.75pp is noise, two is a message.
6 What would change our mind
| Our current read | Evidence that would overturn it |
|---|---|
| The usage recovery is real | Fees and volume falling together while float stays flat |
| BNB Chain's volume level is durable | A week back below $9bn, erasing both gains |
| Upstream-mint risk is now systemic across bridges | A week with no new unbacked-mint incident and a shipped reconciliation standard |
| Solana staking's fall was noise, not the disinflation path | A decisive break below 4.4% over the next two weeks |
| Ethereum's lending premium is easing, not collapsing | A drop below 0.5pp alongside flat utilisation |
7 Risk register
| Risk | Likelihood | Impact | What would change our read |
|---|---|---|---|
| Upstream-mint losses at bridged assets | elevated — two more cases this week | high | A week with no new unbacked-mint incident, or systemic supply-reconciliation controls |
| Duplicate-payment and refund-logic bugs | elevated | medium | Chainflip-class incidents recurring on other memo- or refund-based flows |
| Usage outgrowing deposits | emerging | medium | Stablecoin float growing again alongside volume, or volume fading |
| L-BTC partial backing persists | high while unresolved | high for holders | Return of the remaining 598.5 BTC or a stated compensation plan |
| Signature-phishing campaigns | high | medium | A shift from approval-based losses to transfer-signature drains |
| Regulatory restriction | medium | medium | Enforcement action or a new licensing requirement |
We split last week's authorised-minter risk into two lines: unbacked mints at bridged assets, now confirmed across three venues in a fortnight, and duplicate-payment bugs in refund logic, new this week via Chainflip. Both are failures of the same discipline — nobody checks that the value being paid out was created only once.
8 Formulas used in this briefing
9 The numbers behind the five answers
| Question | Key metric | Value | Direction | Note |
|---|---|---|---|---|
| Networks | Blended turnover | 0.60x | +6.9% | First rise in several weeks |
| Networks | Weekly fees | $240.5M | +17.4% | Solana led at $108.3M |
| Stablecoins | Total supply | $284.9B | -0.1% | First decline in four weeks |
| DeFi | Total TVL | $74.9B | +1.2% | Ethereum closed above $50bn |
| DeFi | Weekly DEX volume | $45.2B | +8.2% | Three chains grew volume |
| Yields | Stablecoin lending, Ethereum | 4.00% | -0.09pp | Deepest pool set in the sample |
| Yields | Tokenized T-bill funds | 3.32% | -0.01pp | The reference rate for the spread above |
10 How to read this briefing
- The five questions never change, so a changing answer is the signal — read this week against last week rather than in isolation.
- Every number comes from the same dataset used by the data report and news review this week; no column can disagree with another.
- Yield levels are recomputed for the specific week, not quoted from today's snapshot.
- Named judgments are labelled as such. Everything else is arithmetic on public data.
- Where we hold an opinion with real uncertainty, the condition that would overturn it is stated in the table above rather than omitted.
Key Takeaways
- Fees rose 17.4% and volume 8.2% against a 1.2% TVL gain — usage outran deposits.
- Solana posted the largest tracked fee total at $108.3m, up 28.5%, on flat TVL.
- Blended turnover rose to 0.60x, the first increase in several weeks.
- Two more unbacked-mint bridge failures (Nomic, Symbiosis) plus Chainflip's duplicate-refund loss.
- Liquid recovered 3,400 BTC; Blockstream refused a ransom for the remaining 598.5.
- Ethereum's lending premium eased to 0.68pp; Solana staking rebounded to 4.88%.
11 In brief
The direction of the week inverted. Last week capital arrived and activity cooled; this week activity grew at triple-digit-multiple the rate of deposits, and blended turnover turned up for the first time in weeks — from 0.56x to 0.60x. Two of the five answers shifted materially, and this time both moves were the healthy kind.
The security answer is a continuation rather than a break. Two more bridge-class systems failed in the same upstream-mint shape as Liquid — Nomic via double-spent nBTC, Symbiosis via unbacked syBTC — and Chainflip lost 736,442 USDT through a duplicate-refund bug on TRON. Against that, Liquid recovered 3,400 BTC and Blockstream refused a ransom for the remaining 598.5.
Yields were quiet except at the extremes. Solana staking rebounded to 4.88% after last week's fall — answering our own watch item — and Arbitrum lending extended its premium to 4.98%, the widest in the sample.
12 Weekly scorecard
| Dimension | Read | Direction | One line |
|---|---|---|---|
| Networks | Usage-led | up | Fees +17.4%, volume +8.2%, TVL +1.2%; turnover turned up to 0.60x |
| Stablecoins | Flat | flat | Float slipped 0.1%; TRON the only meaningful gainer |
| DeFi | Mixed | mixed | Three chains grew volume; BNB Chain moved 16% above Ethereum |
| Yields | Stable | flat | ETH lending 4.00%; Solana staking rebounded to 4.88% |
| Security | Deteriorated, with a partial recovery | down | Three new bridge-class incidents; Liquid recovered 85% of its reserve |
Sources & Methodology
- DefiLlama — Total Value Locked series across the seven chains tracked.
- DefiLlama — DEX spot volume series across the seven chains tracked.
- DefiLlama — stablecoin supply across the seven chains tracked.
- DefiLlama — network fees across the seven chains tracked.
- DefiLlama yields endpoint — per-week TVL-weighted lending, staking and stablecoin rates.
- Blockstream — Liquid Network recovery statements, Elements v23.3.4 and the ransom refusal.
- Chainflip — official incident blog on the TRON memo exploit.
- SlowMist — incident records for Nomic, Zentra, Amnext, Cozy V2, ether.fi and BeatSwap.
- Symbiosis — statement on the Bitcoin Bridge exploit and recovered funds.
- Uniswap Labs — StablePair Hook announcement; Aave — governance proposals.
Headlines and figures on this page are drawn from the outlets listed above; commentary is clearly labelled opinion and is not investment advice. Last reviewed 2026-09-13.