Commodities are on their longest winning streak as crude oil rallies

Bloomberg Commodity Index set for 15th consecutive session climb; gauge moves higher as base metals advance

Commodities are forging a record-setting run of gains that straddles the end of 2017 and the start of the new year, as crude oil notches multiyear highs and investors bet that booming global manufacturing output will help to sustain rising demand for raw materials.

The Bloomberg Commodity Index, which tracks returns on 22 raw materials, posted an unprecedented 14 days of gains to Wednesday, closing at the highest since February. The index is poised for further gains as metals and oil climb higher, supported by supply disruptions, a weaker dollar and improving demand. Palladium, a metal used in car exhaust