The large CTAs who are trading multiple systems usually trade net positions and some of them easily operate 50 or more systems at a time.

许多使用多重系统的商品交易顾问（CTA）通常只建立净头寸，其中有些人能同时轻松的使用50种以上的系统。

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The increase came from cutting 8, 384 gross shorts and only trimming 130 gross longs, meaning the rise in net positions came from short covering.

FORBES: FOCUS: Mixed Speculative Activity Seen In CFTC Data Following Metals Price Break

They cut net-long positions in gold and silver and net-short positions in copper as seen in both the legacy and disaggregated weekly commitment of traders reports released by the U.S. Commodity Futures Trading Commission for the week ended Dec. 27.

FORBES: FOCUS: Speculators Continue To Cut Exposure To Most Metals- CFTC

All the precious metals saw an increase in net-long positions, while there was a slight drop in copper net-long positions by speculators.

FORBES: CORRECTION - Speculators Continue To Build Bullish Gold Positions - CFTC