what level is pca on when do i do pca on returns does pmca always load returns on each level what level to do pca on what level is pca how do you do economic pca? does the pca always load on different levels why do pcas show different loadings can pca be used on returns does pca on returns and levels vary? what is the difference between a level pca and returns why are levels in pca higher than returns how to calculate pca level on standardized indices pca average level pca on returns do pca load different levels pca on returns vs returns what is pca what is pca pca level can you do pca on both returns