Market overreactions following bad news headlines are usually temporary and can provide the basis for a profitable contrarian trading strategy.
On the 4th of February 2013, a news story broke that the U.S Justice Department was pressing a civil suit against credit rating agency S&P Global for allegedly fraudulently colluding in the subprime mortgage crisis after it failed to rate mortgage bonds adequately prior to the crisis.
In response to the news, S&P Global’s shares tumbled, as can be seen in the price chart below.



