I'd be really disappointed if Tesla raises funds before SP 500 inclusion. If the SP 500 index board makes fund raising a condition, then I'd prefer Tesla to ignore that, and skip this opportunity. The longer Tesla grows while not being included, the bigger the mismatch will become, and the big players (should I say Shorts enablers?) will have to pay big bucks to get an entry ticket. Screw Wall Street, they never cared about the mission anyway.
It is not in Tesla or Tesla investor's interest to destabilize the stock.