Tesla (TSLA.US) stock fell nearly 6% after Bloomberg reported that upstart e-car rival Rivian is preparing for an IPO which will take place most likely in September. Rivian plans to operate mainly on the electric SUVs and pickups market. These are two market segments in which Tesla does not yet have a definite advantage. Initial valuation should reach $50 billion, which may seem like a small figure compared to Tesla which is currently valued at nearly $800 billion. However, according to Bloomberg, Rivian is "one of the highest-profile potential competitors to Tesla" and has raised more than $8 billion to date from investors. This suggests that interest in Rivian could siphon away some of Tesla's stock market enthusiasm.
