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[Wall Street Subway Mosaic Sign New York City USA] benedek/iStock via Getty Images U.S. equity index futures (SPX [https://seekingalpha.com/symbol/SPX]) pointed to a subdued open Monday as investors processed fresh headlines around tech sector investigations and major strategic investments in AI and semiconductors. Here are the five news items investors should watch: NVIDIA LAUNCHES INDEPENDENT PROBE INTO ALLEGED CHINESE ESPIONAGE: Nvidia (NVDA [https://seekingalpha.com/symbol/NVDA]) fell premarket as it said its board initiated an independent investigation [https://seekingalpha.
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