Cardano’s DeFi ecosystem reached a new milestone on September 7, 2026, as total value locked climbed to $65.33 million while the network’s stablecoin market capitalization stood at $64.53 million. The narrow gap between TVL and stablecoin capitalization suggests that stable assets are directly backing trading and lending activity across the network’s smart contracts, reinforcing Cardano’s available liquidity base.
Input Output Global’s weekly engineering report for early September added further technical context. The team documented performance benchmarks for Cardano node version 11.1.0, recording reduced CPU processing usage alongside increased resident memory usage. A corrective patch, 11.1.1, is planned to address memory consumption optimization. Developers also decoupled ledger processing time from disk access time during UTXO queries and replaced the Cairo graphics engine with gnuplot to reduce software dependencies.
On the Hydra scaling protocol, IOG formalized technical specifications in the Agda language after migrating core documentation from LaTeX to Typst. The update integrated automated differential testing between the node and the Hydra validator, released native Hydra node images for Linux ARM64 and AMD64 architectures, added traceability mechanisms to the KZG trusted setup, and redeployed the Hydra explorer on Amazon EC2 instances with optimized UTXO value handling and query caching via Blockfrost. Progress on Leios included on-disk transaction validation tests on LedgerDB and work on a standalone test harness for stake pool operators.
Leios, Cardano’s planned consensus scaling upgrade, delivered a sixfold throughput gain in its first public testnet phase. The protocol peaked at 26.8 transaction kilobytes per second compared with a 4.51 TxkB/s ceiling for the existing Ouroboros Praos system. During the stable final days of the 41-day test, Leios carried 54% of traffic reaching the chain and processed 18 times the transaction count seen on Cardano mainnet over a comparable period. The testnet produced more than 127,000 blocks and about 30,000 Endorser Blocks, with 63 stake pools registered. IOG said fixes were shipped for memory leaks, chain forks, crashes and other implementation problems under load, but none exposed a flaw in the underlying Leios protocol.
However, the test traffic was artificially generated rather than produced by paying users, highlighting a critical economic challenge for ADA holders. Cardano staking rewards rely on a combination of transaction fees and releases from the remaining ADA reserve, and the reserve contribution declines over time. A cost analysis accompanying the Leios specification models a baseline of 48 million ADA in monthly rewards and a 43% decline by 2029, leaving about 20.64 million ADA per month to be replaced through transaction fees. Using an average transaction size of 1,500 bytes and a modeled fee of roughly 0.221 ADA, meeting that target would require sustained throughput of about 36 transactions per second, closer to 45 TPS after Cardano’s 20% treasury deduction. At 50 TPS the model generates about 28.7 million ADA in gross monthly fees, while at 20 TPS it leaves a 9.16 million ADA gap.
Input Output has set a longer-term goal of moving Cardano from roughly 800,000 transactions a month to more than 27 million while making the network economically self-sufficient. Leios is intended to provide the capacity for that growth, with mainnet-readiness targeted by the end of 2026. For stake pool operators and delegators, the more consequential evidence will arrive after capacity tests: sustained real transactions, actual fee generation, and how much of the declining reserve contribution those fees can replace.
