Here are 6 key economic signals for markets to follow as the Fed gets ready to make its next policy move

• The Fed's September policy meeting is underway, with another rate decision due on Wednesday.
• There are six key economic indicators for markets to gauge the health of the US economy.
• The US is likely headed for a mild recession, according to one chief investment officer.

As the Federal Reserve kicks off its two-day policy meeting, there are a slew of economic indicators that could signal what the central bank may do next.