Inference on Risk Premia in the Presence of Omitted Factors / Stefano Giglio, Dacheng Xiu.

Format:

Book

Author/Creator:

Giglio, Stefano.

Contributor:

National Bureau of Economic Research.

Xiu, Dacheng.

Series:

Working Paper Series (National Bureau of Economic Research) no. w23527.

NBER working paper series no. w23527

Language:

English

Physical Description:

1 online resource: illustrations (black and white);

Place of Publication:

Cambridge, Mass. National Bureau of Economic Research 2017.

Summary:

We propose a three-pass method to estimate the risk premia of observable factors in a linear asset pricing model, which is valid even when the observed factors are just a subset of the true factors that drive asset prices or they are measured with error. We show that the risk premium of a factor can be identified in a linear factor model regardless of the rotation of the other control factors as long as they together span the space of true factors. Motivated by this rotation invariance result, our approach uses principal components to recover the factor space and combines the estimated principal components with each observed factor to obtain a consistent estimate of its risk premium. Our methodology also accounts for potential measurement error in the observed factors and detects when such factors are spurious or even useless. The methodology exploits the blessings of dimensionality, and we therefore apply it to a large panel of equity portfolios to estimate risk premia for several workhorse linear models. The estimates are robust to the choice of test portfolios within equities as well as across many asset classes.

Notes:

Print version record

June 2017.