By John Dunnery Whether you’re a water polo player or a chess fanatic, a piano aficionado or an aspiring chef, there are times when you want to achieve peak performance. Perhaps you are taking a test, performing in a competition, or playing in a championship game. Maybe a special friend

published Apr 10th 2016, 5:54 pm, by Emma O’Brien (Bloomberg) — U.S. oil topped $40 a barrel for the first time this month, extending Friday’s surge amid easing concern over a global glut ahead of a meeting of major producers. Commodity-linked currencies held on to gains. West Texas Intermediate crude