UK - The aggregate funding position of the 6,653 schemes in the Pension Protection Fund's 7800 index worsened to a deficit of £53.5bn ($82.6bn) at the end of August.
This compared to a surplus of £6.6bn at the end of July.
The lifeboat fund said this relates to a funding ratio decline from 100.7% to 94.6% - noting total assets were £934bn and total liabilities were £987.4bn, representing an increase of 1.4% over the month and increase of 9.1% over the year.
In addition, the index showed there were 4,701 schemes in deficit and 1,952 schemes in surplus.
The position has improved on the previous year, when a deficit of £124.8bn was recorded at 31 August last year.
The PPF said one of the reasons for the improvement over the year was the change in assumptions used for calculating the s179 liabilities in order to reflect developments in the bulk annuity purchase market.
The aggregate deficit of all schemes in deficit at the end of August is estimated to have worsened to £105.3bn from £64.3bn at the end of July. At the end of August last year, the equivalent figure was £153.8bn.
At the end of August, the total surpluses of schemes in surplus decreased to £51.8bn from £70.9bn at the end of July. At the end of August last year, the total surplus of all schemes in surplus stood at £29bn.
The PPF said: "The FTSE All-Share Index fell by 0.7% over August 2010 and 15-year gilt yields were down 52 basis points. During the month of August there was a 1.4% increase in assets mainly due to rising UK and global equities. However, liabilities rose by 8% due primarily to the significant fall in gilt yields."
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