铂金价格创2014年以来新高，因供应紧张。

Core Viewpoint - Platinum prices have reached the highest level since 2014 due to supply constraints [1] Group 1: Price Movement - Platinum prices have surged significantly, marking a new high since 2014 [1] Group 2: Supply Dynamics - The increase in platinum prices is attributed to tight supply conditions in the market [1]