Historically, September has been one of the toughest months for the S&P 500 (SNPINDEX: ^GSPC). This year, September could be a particularly volatile month for Space Exploration Technology (NASDAQ: SPCX), as the stock price fights to stay above its $135 initial public offering pricing.

This month, there are three challenges SpaceX stock will face. If it can get through it, the stock’s longer-term outlook looks brighter. Here are the three challenges and the potential.

Missed Nvidia in 2009? This Rare Signal Is Flashing Again. In 2009, a “Double Down” signal flashed for a little-known chipmaker called Nvidia. For the first time in years, that same “Total Conviction” signal is flashing for a company 1/100th…