Assume the CAPM holds. There are 3 investors, A, B, and C, and 3 stocks, X, Y, and Z. You observe that
A: holds $4000 of stock X and $3000 of stock Y;
B: holds $1000 of stock Y and $3000 of stock Z.
C: holds $4000 of stock X.
But you do not oberve A's holding of Z, B's holding of X, and C's holding of Y and Z. Based on your observations, you can conclude C holds $_________ of stock Z (keep 2 decimal places).