The 4 main drivers of market strength are all past their prime — and it's leaving stocks vulnerable

For years, the stock market has benefited from a remarkable confluence of positive factors that pushed it to record highs. One Wall Street expert says these catalysts appear past their prime, which could lead to selling in the US market that would put the October correction to shame. Through the first nine months of 2018, everything was firing on all cylinders for the US stock market. Companies were big beneficiaries of President Donald Trump's unprecedented tax cuts. Year-over-year...