Shares of Scientific Games (NASDAQ: SGMS) were jumping 9.2% higher in morning trading Thursday after the global gaming company withdrew its offer to buy the remaining 19% interest in SciPlay (NASDAQ: SCPL) that it doesn't already own. SciPlay stock plunged 18% on the announcement. The deal had been announced in July as an all-stock offer at a price of 0.250 shares of Scientific Games for each share of SciPlay owned.