As the stock market struggles to recover from "Black Monday" in August, many investors are wondering how long it will be before the market regains the levels seen before the crash ... Here we look at seven of the stock market setbacks of the past 30 years to see what lessons they hold for investors today. – UK Telegraph Dominant Social Theme: Once you're in, never get out. Free-Market Analysis: This Telegraph article was published in mid-October but we have seen many of the data points before and encountered the conclusions before as well. It is worth examining because these arguments can be persuasive in their own way and counterarguments are not always obvious. What the article does is examine "30 years of slumps" – putting various stock market "busts" and crashes into context. It covers such crashes as the Program Trade Crash of 1987, the Tech Bubble Crash of 2000 and the Global Financial crisis of 2008. Other crashes that the article mentions include the 1997 Asian crisis, the Greek Debt Crisis of 2011 and China's recent Black Monday Crash. But the 1987, 2000 and 2008 busts are the ones that the article concludes are truly significant. The article examines these three crashes to see what insights they may offer about the present day, as follows: