As the price of gold rises, investors may be contemplating how much they should buy each year. Here's what experts say.

Also on Thursday, the Office for National Statistics will publish its GDP figures for the first quarter of the year, a key indicator of UK economic growth. GDP grew by 0.1% in the last quarter.

U.S. 3 Year Treasury Note 0.0400 3.9800% U.S. 5 Year Treasury Note 0.7220 4.0880% U.S. 7 Year Treasury Note 0.0850 4.2650% ...

Germany 2 Year Government Bond-0.0050 1.9227% ...