Ad tech companies must reckon with their role in warrantless government surveillance, among other privacy harms. The systems they built for targeted advertising are actively used to track people’s location. The best way to prevent online ads from fueling surveillance is to stop targeting ads based on detailed behavioral profiles. Ads can still be targeted contextually—based on the content people are viewing—without collecting or exposing their sensitive personal information. Short of moving to contextual advertising, tech companies can limit the use of their systems for government location tracking by:
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If the received timestamp is greater than the local timestamp, the register overwrites its local value with the received value. It also stores the received timestamp and some sort of identifier unique to the peer that last wrote the value (the peer ID).
然而，对于愿意在市场波动中寻找机会的投资者，防御策略仍然是可行的选择。尽管黄金等避风港资产在短期内遭遇重挫，但今年金价依然上涨近20%。大型石油公司如埃克森美孚和雪佛龙也在原油价格上涨中受益，航空航天与国防类股票因地缘政治波动而获得提振。