Share your insights or perspective on the financial matter presented in the input.

Transferred Stocks in 1993, sold 2017 taxes
Assuming the stock was worth more at the time she gave it to you than when she bought it, the cost basis would be the amount that she bought it for. You would then pay tax on the increase in value from that time.  Generally it's better to inherit assets than receive them as gifts, since the cost basis of inherited assets is raised to the value at the time of the death of the one leaving the inheritance. You will probably need to find some record of the original amount paid so you can determine the right cost basis.