MELBOURNE, Jan 5 (Reuters) - Oil prices fell on Wednesday as rising fuel stockpiles in the United States raised concerns of declining demand in the world's biggest oil consumer amid a massive spike in COVID-19 cases caused by the Omicron variant.

SYDNEY, Jan 5 (Reuters) - The yen was pinned near a five-year low on the dollar on Wednesday and nursing losses on other crosses as traders wagered the Bank of Japan would lag a looming wave of global policy tightening as inflation gallops ahead around the world.

HONG KONG, Jan 5 (Reuters) - Asian stocks fell on Wednesday as higher U.S. Treasury yields weighed on global tech firms and pushed the dollar to a five-year high against Japan's yen.

TOKYO, Jan 4 (Reuters) - Asia's factory activity grew in December as companies took rising global cases of the new Omicron coronavirus variant in stride, though persistent supply constraints and rising input costs clouded the outlook for some economies.

MELBOURNE/BEIJING, Jan 4 (Reuters) - Oil prices rose on Tuesday as investors embraced expectations that oil producers will add supply at a meeting on Tuesday as a sign that fuel demand remains robust despite the spread of the Omicron variant of COVID-19.

TOKYO, Jan 4 (Reuters) - Japan's manufacturing activity grew for an 11th straight month in December, but at a slower pace than in the prior month as output and new order growth softened while cost pressures stayed elevated.