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?

Print the post  



The 2009 BMW Method Conference has been cancelled, due to minimum attendance numbers not being met. We hope to continue the annual BMW Method Conference tradition next fall.

Learn about the first four conferences on the BMW Method Website.

The BMW Method FAQ

BMW Method Website
Annual Conference Videos and Other Resources & Services
What was Your Dumbest Investment?
Share it with us -- and learn from others' stories of flubs.
When Life Gives You Lemons
We all have had hardships and made poor decisions. The important thing is how we respond and grow. Read the story of a Fool who started from nothing, and looks to gain everything.
Community Home
Speak Your Mind, Start Your Blog, Rate Your Stocks

Community Team Fools - who are those TMF's?
Contact Us
Contact Customer Service and other Fool departments here.
Work for Fools?
Winner of the Washingtonian great places to work, and Glassdoor #1 Company to Work For 2015! Have access to all of TMF's online and email products for FREE, and be paid for your contributions to TMF! Click the link and start your Fool career.