Rivian Automotive, Inc. (NASDAQ:RIVN) shares have seen a strong rebound from near record lows over the past two sessions, catalyzed by the unveiling of the electric-vehicle startup’s second-gen, affordable model R2, a smaller R3 model and a performance variant of the same model, codenamed R3X. A fund manager on Friday said the stock could be poised for further upside. What Happened: “$RIVN [Rivian] reminds me of $TSLA [Tesla] in 2019 when naysayers predicted it would run out of cash and the equity would be worthless,” Gary Black said in a post on X. The fund manager sees Rivian’s production in…