Reinsurers have produced “robust” results despite enduring persistently poor conditions, according to Willis Re’s latest market report.

The total reinsurance capital pool increased to $US449 billion ($596.26 billion) last year from $US427 billion ($567.05 billion) in 2015.

Aggregate shareholders’ funds for companies on the Willis Re Index grew 4.4% to $US344.1 billion ($456.96 billion), but aggregate net income fell to $US26.6 billion ($35.32 billion) from $US30.3 billion ($40.24 billion).

Return on equity worsened to 8% from 9.3%.

“The continued challenging conditions of the market further impacts pressure on margins,” Willis Re Global CEO John Cavanagh said.

“However, buyers can take comfort from the fact the market balance sheet and headline figures remain robust in the face of persistent market softening due to continued reasonable net income and measured capital management strategies.”

The index includes 37 companies worldwide.