For the retail investor, the only certainty of our current market environment is uncertainty. Volatility is up, and the main indexes are showing deepening losses. As if that wasn't enough, at least one market bull is turning a bit more pessimistic. JPMorgan strategist Marko Kolanovic has been one of the more bullish voices on Wall Street in recent months, but current conditions have him pushing the timeline back. While he still believes that the S&P 500 can hit 4,800, or a 32% gain from currentClick Here To Get Funded!