* Global manufacturing sentiment improves in January
* Bumper earnings from big tech firms cheer markets in early Friday trading
* IMF predicts housing demand in China to drop 50% over next decade
* US jobless claims, although still low, increase to 11-week high
* Job cuts in US jump to 10-month high in January
* Construction spending in US beats expectations by wide margin
* ISM Manufacturing Index rises to 15-month high in January:

US 10-year Treasury yield extends recent slide, falling under 3.9% to lowest level so far this year: