JPMorgan Chase has significantly increased its stake in Sivers (SIVE) following a retreat by retail investors, according to Serenity, a self-proclaimed stock market guru. The bank's holdings in Sivers surged from 0.4% to over 5% within a month, driven by institutional investment. Serenity highlighted the importance of Sivers in the co-packaged optics supply chain, a point he believes has been overlooked by the market.