Kuwait’s Public Institution for Social Security (PIFSS) achieved its best annual performance ever with a 16.5 percent rate of return in the year to March 31. The pension fund ended the fiscal year with $133.7 billion in assets, an increase of 20.9 percent on the year earlier period, it said in a statement on Wednesday. Cash now accounts for 4 percent of its investments, down from about 11.5 percent a ...