London's FTSE 100 dropped on Monday, as economists slashed their expectations for the global economy this year, Reuters reported. The blue-chip index fell 4.2%, sinking back into the red after a two-day bounce due to the extraordinary stimulus unveiled by governments and central banks in the UK and beyond last week. The index was down 35% from its peak in January and on course for its worst monthly performance since 1987, while the FTSE MID 250 index of midcap stocks was down over 40% from its all-time high.