Teaching note on rho and beta + H7

Teaching note on rho and beta + H7 - H AAS S CHOOL OF B...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: H AAS S CHOOL OF B USINESS UGBA 103 U NIVERSITY OF C ALIFORNIA AT B ERKELEY A VINASH V ERMA B RIEF T EACHING N OTE AND H OMEWORK 7 Let us first note that squared correlation, commonly referred to as “R-squared,” between returns on S ecurity i and those on the market portfolio measures the percentage of the total risk of the security that cannot be diversified away. To elaborate, we can decompose the total risk of S ecurity i, denoted 2 i σ , into two components in the following equation: σ β σ σ ε i iM M i 2 2 2 2 = + . The first term on the RHS is the systematic or the undiversifiable risk, and the second term is the unsystematic or diversifiable risk. It follows that the percentage of the undiversifiable risk to the total is: 2 2 2 i M iM σ σ β . Now, by definition: M i iM im M i iM iM σ σ ρ σ σ σ σ ρ * * * = ⇒ ≡ ; And, again by definition: β σ σ iM iM M ≡ 2 ....
View Full Document

This note was uploaded on 04/30/2010 for the course L&S 101 taught by Professor Chow during the Spring '10 term at Berkeley.

Page1 / 2

Teaching note on rho and beta + H7 - H AAS S CHOOL OF B...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online