Replies to post #2829 on Strategy Central

[capt_jmj]

TC, there were numerous instances of duplicate entries, and not just in the last month or so. They usually occured around holidays when the market was closed, but then were carried forward to the next trading day. The tipoff was when there were many more entries on the downloaded files (from the unicorn site), than there were days.

[capt_jmj]

TC, to clarify what I did a bit more, the duplicates I found were in the *data downloads*, and once I had resolved those inconsistencies and felt I had a "clean" data base all the way back to 1/2/86, I linked the Nasi sheet Adv Dec values to the new data. That's when the returns jumped, so I can only assume that some of the new values were different from those that were originally in the Nasi sheet. It would simply not have been workable to go through each entry and change or verify it manually. However, prior to the linking, I made sure there was a one-to-one correspondence with the data ranges, so I am fairly confident that the new data is more correct, to the extent of the reliability of the unicorn site. I would welcome and encourage anyone to duplicate my findings independently.

[fishbait]

tclark1:

Can you help me out with this information (link below).

http://www.investorshub.com/boards/read_msg.asp?message_id=10888128

Thanks in advance.


PS: Capt jmj...thanks again