Reuters reported that an investment firm has bought a controlling stake in Singapore shipbuilder Jaya Holdings, triggering a mandatory cash offer for the outstanding shares in a deal valuing Jaya at $655m. Cayman Islands-incorporated Nautical Offshore Services and Jaya said in statements to the Singapore Exchange late on Friday that Nautical had acquired 44.3 percent of the Singapore firm and would make a mandatory cash offer for the remaining shares. Jaya suspended trading in its shares early on Friday, pending an announcement. Jaya owns a small shipyard in Singapore and another in the Indonesian island of Batam. It also owns a fleet…