An experimental AI stock portfolio managed by Grok has outperformed the S&P 500, turning a $100,000 starting investment into $148,485 in less than nine months. In this line, data from the Rallies Arena competition show that the portfolio has generated a total return of 48.48% since late November 2025. Over the same period, an equivalent investment tracking the S&P 500 would have grown to about $114,101, representing a return of 14.10%. The resul…
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