Citing the U.S.-China trade war, this opinion says the economic conditions in the U.S. are not conducive for risk-taking.   Today's Stocks & Topics: BIG - Big Lots Inc., Return on Equity, CVS - CVS Health Corp., China Trade Deal, Investment Choices, U.S. Produce Prices, Books, GE to Freeze Workers Pensions, STLD - Steel Dynamics Inc.   Plus: Key Benchmark Numbers and Market Comments for: Gold, Oil, Gasoline, Treasury Yields, Taxes; TRIVIA QUESTION: "Mortgage rates TODAY are at or near historic lows. What were the rates in the 1940s and 1950s-- during the time of the FIRST mass suburban migration?"