portfolio-rebalancer is a simple command line tool with UI to rebalance your stock portfolios to a target allocation, written in Rust.

edit portfolio.json with your target allocation and your assets

then run the tool cargo run -- portfolio.json

one tab will show the original allocation and the result

the second tab will show the actions (BUY SELL) to do to reach the target allocation

NB the math is quite untested, use at your own risk.