Dries Heyman

Dries Heyman
Ghent University | UGhent

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17
Publications
3,320
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366
Citations

Publications

Publications (17)
Article
Using a novel brokerage dataset covering individual investors’ login and stock trading behavior, we investigate the severity of the disposition effect as a function of attention. Our results show that more attentive investors trade less in line with the disposition effect, suggesting a comparative advantage in incorporating information into financi...
Article
The Google Search Volume Index is proposed as a novel and improved proxy for overreaction as selling winner stocks after they enjoyed a substantial surge in search volume is found to be profitable. It increases the gains of a standard reversal strategy, net of transaction costs, from 17.5 basis points to 34.2 basis points on a weekly basis, corresp...
Article
Full-text available
Using a novel brokerage dataset covering individual investors’ login and stock trading behavior, we investigate the severity of the disposition effect as a function of attention. Our results show that more attentive investors trade less in line with the disposition effect, suggesting a comparative advantage in incorporating information into financi...
Article
The literature examining mutual fund performance is vast and researchers have studied the performance of professional money managers extensively, but there is still an ongoing debate whether or not mutual fund managers have stock picking skills. This article investigates the profitability of institutional trades using a unique dataset comprising th...
Article
This paper analyzes stock option trading records of online retail bank investors to assess individual net buy positions in poor versus well performing stock. We study stock options since this is a unique investment category that allows disentangling the heavily-debated contrarian versus emotional bias explanations for individual trading decisions....
Article
Literature reveals that many investors rely on technical trading rules when making investment decisions. If stock markets are efficient, one cannot achieve superior results by using these trading rules. However, if market inefficiencies are present, profitable opportunities may arise. The aim of this study is to investigate the effectiveness of tec...
Article
This paper analyzes trading records of online retail bank investors to examine whether attention-type events dominate return feedback strategies in explaining individual investors’ stock option trading decisions. We show that although individual investors are net buyers of common stock on abnormally high volume days, they follow contrarian investme...
Article
This paper explores a unique data set comprising the transactions executed by a large sample of mutual funds for the period August 2002 - April 2007. This data set qualifies as a worthy counterpart for another (often used) transactional data set provided by the Plexus Group. It will serve as input for various papers, but is interesting in its own r...
Article
Full-text available
We examine the determinants of the debt-equity choice and the debt maturity choice for a sample of small, privately held firms in a creditor oriented environment. Our results, which are based on 4,706 firm-year observations for 1132 Belgian firms in the period 1996–2000, generally confirm the role of asymmetric information and agency costs of debt...
Article
This paper explores the use of options by individual investors. We make use of a dataset of online traders of a large Dutch bank, and combine this dataset with a survey containing both hard and soft information about the online investors. We reach several conclusions: Firstly, investors favour shorting options over going long in options. Secondly,...
Article
We examine the determinants of the debt-equity choice and the debt maturity choice for a sample of small, privately held firms in a creditor oriented environment. Our results, which are based on 4,706 firm-year observations for 1132 Belgian firms in the period 1996–2000, generally confirm the role of asymmetric information and agency costs of debt...
Article
Using a unique data set of mutual fund transactions, this paper examines two widely acknowledged behavioural biases: overconfidence in trading and disposition behaviour. We test for the first bias by comparing the future profitability of the purchased and sold securities by mutual funds. Our empirical results show that the return difference between...
Article
In this paper, we elaborate a formula for determining the optimal strike price for a bond put option, used to hedge a position in a bond. This strike price is optimal in the sense that it minimizes, for a given budget, either Value-at-Risk or Tail Value-at-Risk. Formulas are derived for both zero-coupon and coupon bonds, which can also be understoo...
Article
Full-text available
This paper studies a strategy that minimizes the Value-at-Risk (VaR) of a position in a zero-coupon bond by buying a percentage of a put option, subject to a fixed budget available for hedging. We elaborate a formula for determining the optimal strike price for this put option in case of a Vasicek stochastic interest rate model. We demonstrate the...
Article
Full-text available
In this paper, we elaborate a formula for determining the optimal strike price for a bond put option, used to hedge a position in a bond. This strike price is optimal in the sense that it minimizes, for a given budget, either Value-at-Risk or Conditional Value-at-Risk. Formulas are derived for both zero coupon and coupon bonds, which can also be un...
Article
Once a firm decides to issue debt, the characteristics of this debt instrument should be considered. One of the critical decisions involves debt maturity. Using a sample of 1091 Belgian small firms from 1996 until 2000, this study analyses the determinants of the corporate debt-maturity structure of small firms in a creditor-oriented s ystem. Consi...
Article
Full-text available
This paper studies a strategy that minimizes the risk of a position in a zero coupon bond by buying a percentage of a put option, subject to a fixed budget available for hedging. We consider two popular risk measures: Value-at-Risk(VaR) and Tail Value-at-Risk (TVaR). We elaborate a formula for determining the optimal strike price for this put optio...

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