Investment trust RIT Capital Partners said its total return in 2014 was 13.3%, while the net value of its portfolio had reached an all-time high.The group, which does not have a formal benchmark, said its net asset value total return for the year was 9.5%, while its net asset value increased 3.3% in January to 1,531pRIT's total net assets at the end of 2014 rose to £2.3bn, the highest level the trust has recorded and the FTSE 250 group said it recommended a dividend of 15p per share in April and 15p per share in October, representing a 2% increase on the total 29.4% paid last year."We have kept our quoted equity exposure at moderate levels and have sought to add to returns through a widely diversified range of activities," said group chairman Lord Rothschild."Returns in the year under review were achieved through stock selection, by sub-contracting capital to talented and specialised investment managers and active currency positioning."Rit Capital Partners shares were down 0.14% to 1,526.60p at 11:41 on Friday.