The S&P 500 and the Nasdaq stock indexes are on track to have their third consecutive week of gains. However, the US stock market was a bit unsteady earlier in the day. This is unusual because September has historically been a difficult month for the US stock market. Data shows that since the year 2000, the S&P 500 has, on average, lost 1.4% of its value during this month. Most Read: Post-FOMC US dollar surge shifts global markets – DXY outlookHow has the US Dollar Reacted?