.---------------------------------------------The analysis of volatility in the prices received by producers of coffee in the international market has demonstrated the … persistence of volatility in the group was observed by empirical measurement of econometric models GARCH. The test ARCH … volatility. The sum of the coefficients of reaction (ARCH) and persistence (GARCH) resulted in values very close to 1 for these …

aims to analyze the volatility process of the return the prices of beef cattle in the State of São Paulo; examining two … factors determinatives, the persistence of shocks and asymmetry in the volatility, by means of the application of ARCH …/GARCH models. The empirical results had shown persistence reactions and asymmetry in the volatility, that is, the negative and …

. The volatility of spot stocker cattle prices is comparable to spot feeder cattle prices, supporting the idea of using … feeder cattle implied volatility measures as estimates of stocker cattle futures implied volatility in option pricing models …

hedge funds and CTAs and market volatility. However, a positive relationship between hedge fund and CTA trading volume and … market volatility is consistent with either a private information or noise trader hypothesis. Three additional tests are …

Few studies have examined the impact of portfolio concentration upon the realised volatility of stock index portfolios … volatility and increases in the equally weighted components of the realised VCM. The results have important implications for … portfolio managers concerned with the effect of changing portfolio weights upon portfolio volatility. They are also relevant to …

) incommodity futures price volatility spurious, following Granger?s conjecture? Yes,only two out of eleven commodities are ….Second, do large Index Traders such as commodity pools and pension funds increasefutures price volatility through a large volume …

A new heteroskedastic hedonic regression model is suggested which takes into account time-varying volatility and is … expectation. The art price index is a smooth function of time and has a variability that is comparable to the volatility of stock …

volatility comparable to the Great Moderation of the 1980s-2000s. This moderation occurred despite a lack of central banks, low …