Open Access
The impact of investor sentiment on stock returns in emerging markets. The case of Central European markets
(Taylor & Francis, 2015) Corredor Casado, María Pilar; Ferrer Zubiate, Elena; Santamaría Aquilué, Rafael; Gestión de Empresas; Enpresen Kudeaketa
This paper studies the effect of investor sentiment on stock returns in three Central European markets: the Czech Republic, Hungary and Poland. The results show that sentiment is a key variable in the prices of stocks traded on these markets and its impact is stronger here than in more developed European markets. This effect is linked to stock characteristics, particularly those considered to make stocks more prone to the influences of investor sentiment. The evidence shows that the effect is not uniform across countries, since higher levels are found for Poland and the Czech Republic, thus confirming the role of country-specific factors in the impact of investor sentiment on stock prices. The results also confirm that sentiment is a twofold (global and local) phenomenon, in which the global dimension has much greater impact than the local dimension, at least in the markets considered. Finally, the paper has shown that sentiment does not spread, at least to any significant degree, through the movement of capital between markets. This strengthens the argument that sentiment is transmitted through a behavioral mechanism. If this argument proves correct, there is little likelihood of local regulatory action being very effective in limiting the perverse impact of asset bubbles.
Open Access
Momentum and default risk. Some results using the jump component
(Elsevier, 2015) González Urteaga, Ana; Muga Caperos, Luis Fernando; Santamaría Aquilué, Rafael; Gestión de Empresas; Enpresen Kudeaketa
In this paper we separate the total stock return into its continuous and jump component to test whether stock return predictability should be attributed to omitted risk factors or behavioral finance theories. We extend results from the US market to the Spanish stock market, which, despite being a developed market, presents several differences in terms of stock characteristics, financial system, investor typology and cultural dimensions. The results show that the jump component has significant explanatory power for the premium of three characteristics (size, book-to-market and illiquidity), which is at odds with risk-based explanations. Using the same testing strategy, we try to shed some light on an important controversy concerning the relationship between default risk and momentum. The results suggest that default risk is not the source of momentum returns.
Open Access
The effect of US holidays on European markets: when the cat's away...
(Wiley, 2013) Casado Sorozabal, Jorge; Muga Caperos, Luis Fernando; Santamaría Aquilué, Rafael; Gestión de Empresas; Enpresen Kudeaketa
This paper presents evidence of the existence of a return effect on European stock markets coinciding with NYSE holidays, which is particularly marked after positive closing returns on the NYSE the previous day. The effect is large enough to be exploited by trading index futures. This anomaly can not be explained by seasonal effects, such as the day of the week effect, the January effect or the pre-holiday effect, nor is it consistent with behavioral finance models that predict positive correlation between trading volume and returns. However, examination of factors such as information volume or investor mix provides a reasonable explanation.
Open Access
Hidden power of trading activity: the FLB in tennis betting exchanges
(SAGE Publications, 2017) Abinzano Guillén, María Isabel; Muga Caperos, Luis Fernando; Santamaría Aquilué, Rafael; Institute for Advanced Research in Business and Economics - INARBE
This paper examines the impact of trading activity on the Favourite-Longshot Bias (FLB) in tennis Betting Exchanges, using direct measures such as betting volume, average bet and standard deviation of the odds. According to predictions based on Disagreement Models, odds mispricing is positively associated with trading volume but negatively associated with the presence of institutional bettors. The FLB is also positively related to the degree of uncertainty in the market. The existence of two simultaneous markets (a “main” and an “alternative” market) in this specific sports-betting environment has enabled us to observe that the relative amount of attention given to the favourite versus that given to the long shot is positively associated with the FLB. Finally, information is more rapidly incorporated into the odds in the market that receives more attention from bettors, an effect that is intensified by the arbitrage and hedging that occurs between the two markets.

Santamaría Aquilué, Rafael

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