It took just 42 trading days for the Dow Jones industrial average to go from 19,000 to 20,000 points, the barrier it crossed yesterday. That marks the Dow’s second-fastest march from one thousand-point marker to the next. The record is just 24 sessions, which was how long it took for the index to climb from 10,000 to 11,000 during dot-com-mania in 1999.
On one hand, each 1,000-point rise is less impressive than the last. The climb from 10,000 to 11,000 amounted to full 10 percent gain, for example, while 19,000 to 20,000 equated to just a 5.26 percent rise.
But even when taking that into account, the latest 1000-point move has still been very impressive on a per-day basis. A 5.26 percent increase over the course of 42 days translates into an average gain of about 0.13 percent per day.