This banker thinks Rivian has a demand problem -- but production is a bigger problem for Rivian.Rivian Automotive (RIVN -3.48%) stock -- like most stocks -- got rocked on Wednesday after higher-than-expected inflation data dashed investor hopes for a series of Federal Reserve rate cuts in 2024. But not to worry, says Bank of America.Inflation or no inflation, and rate cuts or no interest rate cuts ... Rivian's stock price will more than double, and hit $21 a share within a year, according to BofA analysts. ...