Brent crude slipped towards $106/B on Tuesday as caution among investors grew that any fresh stimulus measures coming from meetings of central banks in the US  and Europe may not be enough to revive their stuttering economies. The overwhelming uncertainty over the health of the global economy offset lower OPEC production and an unexpected drop in US crude stockpiles (Reuters). Brent crude eased 8 cents to $106.12/B, while US crude edged up 3 cents to $89.81/B.