美国商品期货交易委员会（CFTC）：截至5月13日当周，COMEX白银期货投机性净多头头寸减少1,788手至28,460手。

Core Insights - The Commodity Futures Trading Commission (CFTC) reported a decrease in speculative net long positions in COMEX silver futures, dropping by 1,788 contracts to a total of 28,460 contracts as of the week ending May 13 [1] Group 1 - The CFTC's data indicates a reduction in investor confidence in silver, as reflected by the decline in speculative positions [1] - The current level of 28,460 contracts suggests a significant shift in market sentiment towards silver futures [1]