On May 15, 1997, the government of Kuwait offered to sell 170 million BP shares, worth about $2 billion. Goldman Sachs was contacted after the stock market closed in London and given one hour to decide whether to bid on the stock. They decided to offer 710.5 pence ($11.59) per share, and Kuwait accepted. Then Goldman Sachs went looking for buyers. They lined up 500 institutional and individual investors worldwide, and resold all the shares at 716 pence ($11.70). The resale was complete before the London Stock Exchange opened the next morning. Goldman Sachs made $15 million overnight.40

What does this deal say about market efficiency? Discuss.