User profiles for P. J. Westerholm

P. Joakim Westerholm

Academic University of Sydney Business School
Verified email at sydney.edu.au
Cited by 734

Informed trading through the accounts of children

H Berkman, PD Koch, PJ Westerholm - The Journal of Finance, 2014 - Wiley Online Library
This study shows that the guardians behind underaged accounts are successful at picking
stocks. Moreover, they tend to channel their best trades through the accounts of children, …

Industry clustering in Nordic initial public offering markets

PJ Westerholm - International review of finance, 2006 - Wiley Online Library
We present institutional features of the Nordic initial public offering (IPO) markets and relate
initial return, long‐run performance and size of companies listed during 1991–2002 to …

Inside the director network: When directors trade or hold inside, interlock, and unconnected stocks

H Berkman, P Koch, PJ Westerholm - Journal of Banking & Finance, 2020 - Elsevier
Abstract Analysis of shareholdings reveals that corporate directors generate positive alpha
when they hold board interlocked stocks, where they are not an insider but a current co-board …

An empirical analysis of algorithmic trading around earnings announcements

…, T Prodromou, GHK Wang, PJ Westerholm… - Pacific-Basin Finance …, 2017 - Elsevier
This study examines the impact of corporate earnings announcements on trading activity
and speed of price adjustment, analyzing algorithmic and non-algorithmic trades during the …

Contrarians or momentum chasers? Individual investors' behavior when trading exchange‐traded funds

…, D Feldman, G Garvey, PJ Westerholm - Journal of Futures …, 2019 - Wiley Online Library
Conducting the first study of momentum impact on households’ exchange‐traded fund (ETF)
trading behavior, we find that Finnish households are less contrarian when trading …

CEO traders and corporate acquisitions

H Leung, J Tse, PJ Westerholm - Journal of Corporate Finance, 2019 - Elsevier
This paper investigates whether the personal trading decisions of CEOs are related to their
corporate acquisition decisions. We find that the personal trading performance of CEOs …

Algorithmic trading, liquidity, and price discovery: An intraday analysis of the SPI 200 futures

T Viljoen, PJ Westerholm, H Zheng - Financial Review, 2014 - Wiley Online Library
We study the intraday price impact of algorithmic trading (AT) on futures markets. We find that
AT exhibits a strong reverse U‐shape intraday pattern, and greater AT activity is related to …

Institutional trading and asset pricing

…, TD Huynh, A Tourani-Rad, PJ Westerholm - Journal of Banking & …, 2018 - Elsevier
This paper examines whether the trading activity of different investor types, institutional
versus retail, can affect the relation between beta and average returns. We find that the beta-…

Fool's mate: What does CHESS tell us about individual investor trading performance?

R Bradrania, A Grant, PJ Westerholm… - Accounting & …, 2017 - Wiley Online Library
We investigate the short‐term relation between individual investor trading and stock returns
on the Australian Securities Exchange. Stocks heavily bought by individual investors …

[PDF][PDF] The impact of transaction costs on turnover, asset prices and volatility: the cases of Sweden's and Finland's security transaction tax reductions

PJ Westerholm - Liiketaloudellinen aikakauskirja, 2003 - lta.lib.aalto.fi
Drastic changes in transaction tax on securities trading in both Sweden and Finland give us
a unique opportunity to study the effects of a purely exogenous change in transaction costs. …