OLDWICK, N.J.--(BUSINESS WIRE)--Private equity investments by the U.S. life/health and property/casualty industries have risen sharply by approximately 25% over a two-year span to $55.4 billion and $16.0 billion, respectively, according to an AM Best special report. The new Best’s Special Report, titled, “Private Equity Holdings Spike for All Insurance Segments,” states that of overall private equity investments, the insurance industry as a whole has the greatest exposure to leveraged buyout funds—approximately…