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Sorry all, had some more trouble with Yahoo, which killed last week's chart update and has delayed this week's.

I found a Python script on Github that downloads historical data with the new Yahoo authentication structure, and after modifying it (with a couple of bug fix cycles along the way), the charts are on their way. It will probably be another hour or two for all the updates to appear at One glitch may show up: indexes won't have their names shown; that will be fixed next week.

Current download size: monthly data from 1960 to present for 2469 companies and indices. That's 1.7 million data points, although most of them are empty since most companies don't have data that far back.

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