Historical Stock Prices???

I was told to calculate the cost basis for a client's portfolio which was positioned at different intervals between 1970 and 2000. First of all, being new to this stuff, what price should I use to calculate the cost basis for a certain stock; the split adjusted price or the regular price? At first I thought the adjusted, but isn't that used for comparison purposes only? Secondly, where can I find prices for purchases in the 70s? Most sites like Yahoo Finance and MarketWatch only go back so far. Thanks so much for the help.

24 Comments
 

lol this sucks. This was my first project they had me do at my 2nd PWM internship for AT&T. Let me just tell you figuring out cost basis for AT&T and all the spin offs and spin off of spin offs is just a nightmare. Good luck.

"Oh the ladies ever tell you that you look like a fucking optical illusion" - Frank Slaughtery 25th Hour.

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Yahoo Finance or Google Finance have the option. If you meant as in dl 30 stock comparisons at once, then no. You can get 1 by 1 though.

 

There are plenty of robust sources where you can pull the data from, but they aren't cheap. Bloomberg is what I use, but its far from the only source.

The free ones will be more limited in what they can do (like was said above; one at a time).

 

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