Forget a tale of two cities, it's two different worlds for traders in the U.S. stock market. If you're tracking index gains in the S&P 500 , it's a slow and steady grind as volatility declines to the lowest since January, with the Cboe Volatility Index (VIX) touching 15.6 Thursday, compared to 35 in March when geopolitical fears drove daily whipsaw moves in the market. If you've been trading individual stocks, the roller-coaster ride hasn't stopped, and in many cases – particularly in tech