Balance of risks to world economy tilted to the downside, says IMF
*Urges developing economies to focus on preserving, rebuilding buffers Global growth is projected to reach 3.9 percent in 2018
IMF sees brighter global prospect, optimistic markets on U.S tax policy changes
The International Monetary Fund (IMF) has revised its forecast global growth by 0.2 percentage points to 3.9 percent in 2018/19 on