OC - Rebalance moves companies among MidCap SmallCap indexes September, 06 2019 05:47 PM Owens Corning Inc New Nine companies are moving into the S&P MidCap 400 index, and 10 joining the SmallCap 600, as part of a September rebalancing.More news on: Selective Insurance Group, Inc., Repligen Corporation, FirstCash, Inc., Stocks on the move Read more ...