
Based on the information provided, a 1964 Kennedy half dollar is composed of 90% silver. Each coin contains 0.3617 troy ounces of pure silver.
The year a Kennedy half dollar was minted is the primary factor in determining its silver content. The 1964 issue is unique in the series for its high 90% silver composition. This makes it particularly valuable for both coin collectors and precious metal investors.
Subsequent issues of the Kennedy half dollar had reduced silver content or were made of other metals entirely. For example, coins from 1965 to 1970 contained only 40% silver, and most modern Kennedy half dollars contain no silver at all. Therefore, the 1964 coin stands out as the most silver-rich of the series.


