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Papers by Dimitris Georgarakos

Abstract Do negative policy rates hinder banks’ transmission of monetary policy? To answer this question, we examine the behaviour of Italian mortgage lenders using a novel loan-level dataset. When policy rates turn negative, banks with higher ratios of retail overnight deposits to total assets charge more on new fixed rate mortgages. This suggests that the funding structure of banks may matter for the transmission of negative policy rates, especially for long-maturity illiquid assets. Nevertheless, the aggregate economic implications for households are small, suggesting that concerns about inefficient monetary policy transmission to households under modestly negative rates are likely overstated. JEL Code

Papers by Simone Manganelli

Abstract The main objective of this paper is to survey and evaluate the performance of the most popular univariate VaR methodologies, paying particular attention to their underlying assumptions and to their logical flaws. In the process, we show that the Historical Simulation method and its variants can be considered as special cases of the CAViaR framework developed by Engle and Manganelli (1999). We also provide two original methodological contributions. The first one introduces the extreme value theory into the CAViaR model. The second one concerns the estimation of the expected shortfall (the expected loss, given that the return exceeded the VaR) using a regression technique. The performance of the models surveyed in the paper is evaluated using a Monte Carlo simulation. We generate data using GARCH processes with different distributions and compare the estimated quantiles to the true ones. The results show that CAViaR models perform best with heavy-tailed DGP.

Papers by Manfred Kremer

Abstract After a period of about two years with fairly steady price increases and persistently low volatility, global stock markets experienced a notable price and volatility correction in early February 2018. Before this correction, policy authorities had become concerned about the benign volatility conditions, since low volatility may lead market participants to take on excessive risk and thereby create risks to financial stability (the “volatility paradox”). Against this background, a return to conditions of higher volatility could, on the one hand, be regarded as a welcome normalisation. On the other hand, a “disorderly” stock market correction with sharp price declines and large price fluctuations might itself pose risks to financial and economic stability.

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