INVESTMENT FOCUS-Persistent lure of 'safety' over returns

By Mike Dolan LONDON, Feb 22 (Reuters) - As effervescent new year markets turn flat in February, doubts have resurfaced about whether the mass exit this year from hyper-expensive government bonds feared by some will occur. Few strategists doubt investors with long horizons who are willing or able to tolerate the more volatile world equities will eventually be rewarded if they emerge blinking from likely loss-making "havens" of U.S., German or UK government bonds. But if, as many insi