No. of Recommendations: 2
We have a couple of options here:

1) Wait for Yahoo! to fix their adjusted prices (may happen, you never know)

2) Use Yahoo!'s unadjusted prices and split/dividend info to do our own adjustments (can't be that hard, as long as the data is good)

3) Find another data supplier

4) Do #2 with another data supplier such as MSN or Google

Since #1 is uncertain, we should pursue some of the other options and if Yahoo! fixes their data, that's great. But we won't be dependent on it.

I've looked for a cookbook algorithm for adjusting close prices but haven't found one. This can't be hard, as long as the data is good. Long ago I looked for other data suppliers and found that none had adjusted close prices. But that was long ago (more than 5 years, maybe longer) and others may have appeared. The issue has always been getting more than 10 years of data or so. Few providers aside from very expensive ones have long term data.

So my leaning is #2 to start, and then we can test out other data providers who may have better quality data than Yahoo!. Does anyone have a reference to the adjustment algo?

-Mike
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