Dow Jones jumps 387 points as Wall Street rallies

NEW YORK, New York - A softening in U.S. Treasury yields boosted buying on Wall Street Friday with all the key indicves making solid gains.

The 10-year Treasury yield dropped below the crucial 4 percent level. "The stock market is very sensitive to bond yields at this point and looking for some respite to the recent upward moves in yields," Yung-Yu Ma, BMO Wealth Management chief investment strategist told CNBC F