some formulation tells we should add 1/2 mutiplier before convexity (from textbook), but some mock answer sheets dont add 1/2 and directly multiply convexity with squared interest delta. Is there any confirmed way of calculating this? this topic seems very testable, isnt it?
Covered many times; here’s once:
http://www.analystforum.com/forums/cfa-forums/cfa-level-i-forum/91321642