Objective research to aid investing decisions
Menu
Value Allocations for December 2019 (Final)
Cash TLT LQD SPY
Momentum Allocations for December 2019 (Final)
1st ETF 2nd ETF 3rd ETF

Back Doors in Betting Against Beta?

Posted in Size Effect, Volatility Effects

Do unconventional portfolio construction techniques obscure how, and how well, betting against beta (BAB) works? In their November 2018 paper entitled "Betting Against Betting Against Beta", Robert Novy-Marx and Mihail Velikov revisit the BAB factor, focusing on interpretation of three unconventional BAB construction techniques:

  1. Rank weighting of stocks - BAB employs rank weighting rather than equal or value weighting, with each stock in high and low estimated beta portfolios weighted proportionally to the difference between its estimated beta rank and the median rank.
  2. Hedging by leveraging - BAB seeks market neutrality by deleveraging (leveraging) the high (low) beta portfolio based on estimated betas rather than borrowing to buy the market portfolio to offset BAB's short market tilt.
  3. Novel beta estimation - BAB measures stock betas by combining market correlations based on five years of overlapping 3-day returns with volatilities based on one year of daily returns, rather than using slope coefficients of daily stock returns versus daily market returns.

Based on mathematical analysis and empirical results using returns for a broad sample of U.S. stocks during January 1968 through December 2017, they find that:

Please or subscribe to continue reading...
Gain access to hundreds of premium articles, our momentum strategy, full RSS feeds, and more!  Learn more

Daily Email Updates
Login
Research Categories
Recent Research
Popular Posts