He was incredibly successful and in 1984 he joined Carnegie Investment Bank, a major player on the Swedish financial markets.
Barnevik served on the Board of Directors of AB Custos, an ancient investment company, which Qviberg and Hagströmer gradually took over.
Sunday the 29th of August 2010, the Swedish "Finance Inspection" (FI, Finansinspektionen) withdrew their permission to operate as a bank.
In early 2006, Qviberg drew attention to himself again by writing a series of articles in Svenska Dagbladet attacking the trend of corporate social responsibility and stated Ayn Rand as a major inspiration for his own ethics.
In late 2010, Qviberg again drew attention to himself after saying that he won't vote for the Christian Democrats (KD), which he claims to have done in the past.
The reason for not voting on KD in the September 2010 election would, according to Mr Qviberg, be that the minister of the finance markets (who is a Christian Democrat) had made a statement that it was correct to withdraw the permission for HQ to operate as a bank.