How to Build a Crypto Portfolio Rebalancer With Python

The crypto asset management market is projected to grow from $1.96 billion in 2026 to $11.74 billion by 2034 at a 25% CAGR ( Fortune Business Insights ). Automated portfolio rebalancing is one of the core drivers: 78% of institutional investors now use automated rebalancing tools ( Gartner via WunderTrading ), and automated portfolios showed 23% better returns compared to manual management in 2025 ( DarkBot ). Yet most tutorials stop at the math. This guide builds a complete crypto portfolio rebalancer in Python that calculates allocation drift, determines required trades, and executes swaps on-chain across multiple EVM chains using swapapi.dev . What You'll Need Python 3.10+ with requests and web3 installed A wallet with tokens on one or more EVM chains An RPC endpoint (the API returns recommended RPCs, or use Chainlist ) swapapi.dev -- free, no API key, no registration, 46 chains supported Install dependencies: pip install requests web3 Step 1: Define Your Target Allocation Every reb