The composition of the 1964 Kennedy half-dollar is significant due to its 90% fine silver and 10% copper makeup. This metallic composition differentiates it from subsequent issues, which were either clad in silver or composed primarily of base metals.
The presence of a high percentage of fine silver in these coins gives them intrinsic value beyond their face value, especially as silver prices fluctuate. This has made them popular with collectors and investors alike. The historical context of the coin, produced shortly after President Kennedy’s assassination, adds to its collectibility and interest.