AP4, the fourth national Swedish pension scheme, underperformed its benchmark by 0.5 percentage points during the first half of the year, the worst benchmark-relative result of the country's four buffer funds.

AP1's listed assets outperformed its benchmark by 0.05% in the six months to June 30, while AP3's returns were exactly in line with its index. AP2 reported a negative return against benchmark of 0.1%.