Second Thoughts: How 1-second subslots transform CEX-DEX Arbitrage on Ethereum
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866912800769572864 |
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| author | Adadurov, Aleksei Barseghyan, Sergey Chtepine, Anton Eloranta, Antero Sebyakin, Andrei Valitov, Arsenii |
| author_facet | Adadurov, Aleksei Barseghyan, Sergey Chtepine, Anton Eloranta, Antero Sebyakin, Andrei Valitov, Arsenii |
| contents | This paper examines the impact of reducing Ethereum slot time on decentralized exchange activity, with a focus on CEX-DEX arbitrage behavior. We develop a trading model where the agent's DEX transaction is not guaranteed to land, and the agent explicitly accounts for this execution risk when deciding whether to pursue arbitrage opportunities. We compare agent behavior under Ethereum's default 12-second slot time environment with a faster regime that offers 1-second subslot execution. The simulations, calibrated to Binance and Uniswap v3 data from July to September 2025, show that faster slot times increase arbitrage transaction count by 535% and trading volume by 203% on average. The increase in CEX-DEX arbitrage activity under 1-second subslots is driven by the reduction in variance of both successful and failed trade outcomes, increasing the risk-adjusted returns and making CEX-DEX arbitrage more appealing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_00738 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Second Thoughts: How 1-second subslots transform CEX-DEX Arbitrage on Ethereum Adadurov, Aleksei Barseghyan, Sergey Chtepine, Anton Eloranta, Antero Sebyakin, Andrei Valitov, Arsenii Trading and Market Microstructure Computational Finance This paper examines the impact of reducing Ethereum slot time on decentralized exchange activity, with a focus on CEX-DEX arbitrage behavior. We develop a trading model where the agent's DEX transaction is not guaranteed to land, and the agent explicitly accounts for this execution risk when deciding whether to pursue arbitrage opportunities. We compare agent behavior under Ethereum's default 12-second slot time environment with a faster regime that offers 1-second subslot execution. The simulations, calibrated to Binance and Uniswap v3 data from July to September 2025, show that faster slot times increase arbitrage transaction count by 535% and trading volume by 203% on average. The increase in CEX-DEX arbitrage activity under 1-second subslots is driven by the reduction in variance of both successful and failed trade outcomes, increasing the risk-adjusted returns and making CEX-DEX arbitrage more appealing. |
| title | Second Thoughts: How 1-second subslots transform CEX-DEX Arbitrage on Ethereum |
| topic | Trading and Market Microstructure Computational Finance |
| url | https://arxiv.org/abs/2601.00738 |