* Hong Kong shares closed at their highest level in fouryears, as the expected Fed cut, weakening dollar and buoyantlocal technology stocks all helped. Amid signs of returningforeign funds, confidence in China's artificial intelligencecapabilities is rising and U.S. President Donald Trump 'sannouncement of a deal to keep TikTok operating in Americalifted appetite for risk assets. The U.S. and Chinese presidentsare due to speak on Friday. By contrast, Nvidia slipped onTuesday and continued to fall another 1% ...