Disconnected Comparisons In this issue of Disconnected Comparisons, we evaluate 3M Co (MMM) and Rock-Tenn Company (RKT). A USD 100 investment in MMM on 4 January 2002 would have been worth USD 375.52 on 16 January 2015; a USD 100 investment in RKT on 6 December 2010, when trading first began, would have been worth USD 1014.94 on 16 January 2015; and a USD 100 investment in the PM40 on 4 January 2002 would have been worth USD 338.83 on 16 January 2015. Click here to view the comparison. 3M Co (MMM) is a NYSE traded company. Their Web site is 3m.com. Rock-Tenn Company (RKT) is a NYSE traded company. Their Web site is rocktenn.com.