The county beat off the Tayside and West Yorkshire funds, which came second and third respectively, to land the award. The prize was sponsored by Henderson Global Investors.
The Tayside Transport fund secured the top honour for performance in UK bonds, sponsored by Morley Fund Management. Second place again went to the main Tayside council fund, while West Yorkshire also picked up third place.
Brent LBC was the 1999 PT Awards double winner in bonds, as it landed both prizes in the UK bonds and the former global bonds categories.