I transferred some of my personal stock to an investment
club that I am part of. I did not realize it then, but is
there a tax treatment that I need to worry about at the end
of the year?

All the stocks that I transferred had appreciated from the
time I bought them to moving them to the investment club

You, and the club, have major headaches. Read IRS Pub. 541, Partnerships, www.irs.gov/pub/irs-pdf/p541.pdf - specifically the section on contributing assets to a partnership. I'd wait for the experts at bivio to chime in, but I doubt that bivio can handle the necessary tracking requirements for cost basis in this situation. Your best solution might be to take the stocks back and have the club eliminate the transactions as if they never happened.

 

Ira Smilovitz