The R&D Index for the week ending June 1, 2018 closed at 4,338.22 for the 25 companies in the R&D Index. The Index was up 2.38% (or 100.90 basis points) from the week ending May 25, 2018. Sixteen R&D Index companies gained value last week from 0.68% (Bristol-Myers Squibb) to 12.79% (General Motors). Nine R&D…