U.S. Markets: The benchmark S&P 500 index had its best weekly gain in three months, as investors seemed to grow more optimistic about a new round of fiscal stimulus as well as treatment options for the coronavirus. The small-cap Russell 2000 surged over 6%, pulling it back out of correction territory and now within 10% of its 2018 peak.  All of the major U.S. benchmarks finished to the upside last [...]