Cummins ISB and QSB Engine Parts. Based on the Cummins B Series, the ISB engine was launched in 1998 and is available in 4 and 6 inline cylinder models. Design innovations include a 24-valve setup and the Interact electronic engine management system, both contributing to increased fuel efficiency and meeting emission regulations.
From 1920 to 1929, stocks more than quadrupled in value â not because of fundamentals such as corporate production and profits, but rather fueled by rampant speculation. The economic house of cards came to a screeching halt on Black Tuesday, October 29, 1929 when the bubble burst.
The 1930 Wall Street crash would propel the market downward, and the trend would continue until the market bottomed out in 1932. As the stock market and the economy fed on the problems of the other, the fall of 1930 saw the unavoidable signs of depression take hold of the US, almost a full year after the initial crash. The 1929 and 1930 Wall Street crash served to weaken investor confidence, as well as caused a drop in trading volume.