Reports of uprisings in oil-rich countries, rising inflation, and softness in the U. S. housing market are among the negatives that can affect stock prices. With U. S. corporations enjoying the highest profit margins in 18 years, can higher dividend payments, bigger stock buyback programs, and greater merger and acquisition activity trump the negatives? After gaining over 92% in the past two years, the AlphaProfit Fidelity and ETF Core and Focus model portfolios will be repositioned on March 31 with best no load mutual funds for 2011 and top ETFs for 2011 .