Markets are cheering the prospect of rate cuts next year, but it's a double-edged sword

• Markets are waiting for the Fed to slash interest rates next year. 
• But that's a tricky situation for investors, as cuts would likely come in response to a slowing economy. 
• Rate cuts aren't inherently bullish and signs emerging that the economy is slowing into year-end. 

Markets are cheering the possibility the Federal Reserve could begin slashing interest rates next year, but rate cuts are a double-edged sword, Wall Street experts are warning, because of what the move would signal about the broader economy.