Dear all,

I'm working on a Markowitz portfolio on carbon credits. These have not been around for the recommended 30 years. so I changed the data points from monthly to weekly to at least have a bit more to go on. Now I just found that the yield for a treasury 10-year bond is 2%. It is probably really easy but I can't seem to figure out how I should come to the weekly yield that I can use as the risk-free rate weekly.

Kind regards,