Facebook’s shares simply can’t seem to be succeessful and on Tuesday they closed at $31, 18% less than their $38 initial offer from last Friday. After a lot of speculations, however, it looks like there will also be an official investigation by the Securities and Exchange Commission (SEC) – the authority that monitors the stock market – and the Financial Industry Regulatory Authorithy (FINRA), a private organization that however has some authority in the management of financial exchanges.