Market portfolio

(rephrased mock question) Is the market portfolio perfectly correlated with other portfolios on CML?



I thought the risk free portfolio on CML wouldnt be correlated with market whatsoever but according to CFAI, the answer to the above is that they are perfectly correlated with ALL portfolios on CML. I dont know how risk free portfolio can be correlated to market portfolio

The risk-free portfolio is the single exception, but that’s enough to make the correct answer, “No.” If they said that the answer is, “Yes”, then the author of the question should be drawn and quartered; he’s wrong. Same for the reviewers of the question.