RIT Capital Partners, the UK investment trust in which Jacob Rothschild has a 12% stake, has made a fivefold return on its investment in Shinsei Bank, the Japanese banking group.

It invested £20.8m (€39.5m) in Shinsei, formerly Long Term Credit Bank, in March 2000 and, following its flotation on February 9 and a subsequent 57% increase in the value of its shares, it has made realised and unrealised capital gains of £86m. Other larger institutional investors in the Japanese bank made a total of $7.6bn (€6.2bn) through the initial public offering.