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Is an open-sourced World Stock Index a pipe-dream?
I think that any ETF is "open source" -- the company issues a prospectus and publishes the basket of stocks that make up the index. The stuff that is proprietary are trading strategies and securities or deriviatives that aren't traded on the open market. Swaps, venture funds, hedge funds and other, more "exotic" derivatives are the things that are closed. What do you mean by "open source" in this context?