I was hoping I could get a little help gathering some ideas for a short paper I have to write. I have to essentially answer the questions below and use additional resources so if anyone knows of a good article that would help me answer these questions,

Performance evaluation of a portfolio is difficult. What challenges can investment managers face and what recommendations would you make in effort to meet these challenges? Portfolio insurance has always had an intuitive appeal to investors, particularly if the cost isn't too great. What are some advantages and disadvantages that investment managers should be aware of?