Unverified50% confidenceFactExact time
格罗斯曼-斯蒂格利茨悖论指出，如果市场完全有效则主动收集信息没有回报，但正因为有人主动分析市场才得以保持效率
1
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50%
Confidence
Long-term
Relevance
7/21/2026
First Seen
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