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Working Paper
International transmission of inflation among G-7 countries: a data-determined VAR analysis
We investigate the international transmission of inflation among G-7 countries using a data-determined vector autoregression analysis, as advocated by Swanson and Granger (1997). Over the period 1973 to 2003, we find that U.S. innovations have a large effect on inflation in the other countries, although they are not always the dominant international factor. Similarly, shocks to some other countries also have a statistically and economically significant influence on U.S. inflation. Moreover, our evidence indicates that U.S. inflation has become less vulnerable to foreign shocks since the early ...
Journal Article
Stockholding is still highly concentrated
Working Paper
Does idiosyncratic risk matter: another look
We show that the equal-weighted average stock volatility analyzed by Goyal and Santa-Clara (GS, 2003) forecasts stock returns because of its co-movements with stock market volatility. Moreover, contrary to the positive relation hypothesized by GS and many others, we find that the value-weighted average stock volatility is negatively related to future stock returns when combined with stock market volatility. This puzzling result reflects the fact that the alue-weighted average stock volatility is negatively correlated with the consumption-wealth ratio, and its predictive power vanishes if we ...
Working Paper
Equity market volatility and expected risk premium
This paper revisits the time-series relation between the conditional risk premium and variance of the equity market portfolio. The main innovation is that we construct a measure of the ex ante equity market risk premium using corporate bond yield spread data. This measure is forward-looking and does not rely critically on either realized equity returns or instrumental variables. We find strong support for a positive risk-return tradeoff, and this result is not sensitive to a number of robustness checks, including alternative proxies of the conditional stock variance and controls for hedging ...
Working Paper
Idiosyncratic volatility, stock market volatility, and expected stock returns
We find that the value-weighted idiosyncratic stock volatility and aggregate stock market volatility jointly exhibit strong predictive power for excess stock market returns. The stock market risk-return relation is found to be positive, as stipulated by the CAPM; however, idiosyncratic volatility is negatively related to future stock market returns. Also, idiosyncratic volatility appears to be a pervasive macrovariable, and its forecasting abilities are very similar to those of the consumption-wealth ratio proposed by Lettau and Ludvigson (2001).
Working Paper
Understanding stock return predictability
Over the period 1927:Q1 to 2005:Q4, the average CAPM-based idiosyncratic variance (IV) and stock market variance jointly forecast stock market returns. This result holds up quite well in a number of robustness checks, and we show that the predictive power of the average IV might come from its close relation with systematic risk omitted from CAPM. First, high lagged returns on high IV stocks predict low future returns on the market as a whole. Second, returns on a hedging portfolio that is long in stocks with low IV and short in stocks with high IV perform as well as the value premium in ...
Journal Article
Reading inflation expectations from CPI futures
Journal Article
Why do stock prices react to the Fed?
Working Paper
Does aggregate relative risk aversion change countercyclically over time? evidence from the stock market
Using a semiparametric estimation technique, we show that the risk-return tradeoff and the Sharpe ratio of the stock market increases monotonically with the consumption wealth ratio (CAY) across time. While early studies have commonly interpreted such a finding as evidence of the countercyclical variation in aggregate relative risk aversion (RRA), we argue that it mainly reflects changes in investment opportunities for two reasons. First, we fail to reject the null hypothesis of constant RRA after controlling for CAY as a proxy for the hedge against changes in the investment opportunity set. ...
Journal Article
Stock market returns, volatility, and future output
In this article, Hui Guo shows that, if stock volatility follows an AR(1) process, stock market returns relate positively to past volatility but relate negatively to contemporaneous volatility in Merton?s (1973) Intertemporal Capital Asset Pricing Model. The model helps explain the recent finding that stock market volatility drives out returns in forecasting real gross domestic product growth because the predictive power of returns is hampered by their positive correlation with past volatility. If the positive relation between returns and past volatility is controlled for, however, the author ...