Complex sentence: Although the DJIA reached a record high of 11,750.28 in January 2000, it fell steadily after the bursting of the dot-com bubble, and the September 11 attacks of 2001, it steadily fell, reaching a low of 7,286.27 in October 2002.
Split into simpler sentences: Although the DJIA reached a record high of 11,750.28 in January 2000, it fell steadily after the bursting of the dot-com bubble. Following the September 11 attacks of 2001, the DJIA fell further, reaching a low of 7,286.27 in October 2002.