Corné van Zeijl
Corné joined ACTIAM in September 1994 as portfolio manager, responsible for managing
both equities and bonds. He is also involved in constructing ACTIAM’s model portfolios.
Corne is a well-known speaker for radio and tv (RTL, BNR, Telegraaf, NOS) and at
conferences and has written several books a.o. “Centen & sentiment” about the
psychological aspects of investor behavior. Furthermore he has a weekly column in the
Dutch financial daily, het Financieele Dagblad. Corné started his career at Staalbankiers in
1986 as analist and worked for Robeco Effectenbank, Zurich Insurance and SNS REAAL.
Corné holds a degree in Business Economics from the Haagsche Hoogeschool, is VBA-
certified and is registered with the Dutch Securities Institute as an Investment Manager.
Behavioural Aspects of Portfolio Building
Investors consider themselves as mostly rational, who remain objective in all decisions regarding their portfolio. However, even the most talented experts in the field are being tricked by their subconsciousness to make irrational decisions. In addition, online trading creates a belief among investors that they possess the abilities, knowledge and skills to predict market outcomes. In which way does subconsciousness impact decisions in portfolio building and maintenance? How does the internet strengthen these effects? How can self-control and protection be obtained?