ChipMOS up 6.8% following Tsinghua deal; Siliconware up 4.2% on its own deal

• ChipMOS (IMOS) has rallied towards $20 following news China's state-controlled Tsinghua Unigroup is buying a 25% stake in ChipMOS' Taipei-listed unit for $368.3M.
• Meanwhile, Taiwanese chip packaging/testing peer Siliconware Precision (NASDAQ:SPIL) has struck a similar deal with Tsinghua. Tsinghua is buying 1.03B of Siliconware's Taipei-listed shares for NT$55 apiece (a 21% premium to today's close). Tsinghua's purchase price is equal to $1.65B, and gives it a 24.9% stake.
• As with ChipMOS, Tsinghua will partner with Siliconware to help the latter grow its Chinese operations, and expand its sales to local firms. Siliconware also plans to "explore vertical integration with suppliers of major packaging and testing materials to secure a stable, high-quality supply," and invest in expanding its Taiwanese chip packaging and R&D ops.