On March 1, 2008, the Colombian armed forces launched a military operation 1.8 kilometres into Ecuador on a FARC position, killing 24, including Raúl Reyes, member of the FARC Central High Command. This led to the 2008 Andean diplomatic crisis between Colombia and Ecuadorian President Rafael Correa, supported by Venezuelan President Hugo Chávez.
On March 6, 2008, Infogrames made an offer to Atari Inc. to buy out all remaining public shares for a value of $1.68 per share, or $11 million total. The offer would make Infogrames sole owner of Atari Inc., thus making it a privately held company. On April 30, 2008, Atari Inc. announced its intentions to accept Infogrames' buyout offer and to merge with Infogrames. On October 8, 2008, Infogrames completed its acquisition of Atari Inc., making it a wholly owned subsidiary.
The IPO took place on March 18, 2008. Visa sold 406 million shares at US$44 per share ($2 above the high end of the expected $37–42 pricing range), raising US$17.9 billion in the largest initial public offering in U.S. history.
On March 20, 2008, the IPO underwriters (including JP Morgan, Goldman Sachs & Co., Bank of America Securities LLC, Citi, HSBC, Merrill Lynch & Co., UBS Investment Bank and Wachovia Securities) exercised their overallotment option, purchasing an additional 40.6 million shares, bringing Visa's total IPO share count to 446.6 million, and bringing the total proceeds to US$19.1 billion.
On March 26, 2008, the European Commission opened an investigation into Visa's multilateral interchange fees for cross-border transactions within the EEA as well as into the "Honor All Cards" rule (under which merchants are required to accept all valid Visa-branded cards).