While the stock is well off its lows of the day, as of mid-day Berkshire Hathaway (BRKa) remains down 3% and is poised for its ninth negative day in a row. While nine straight days of negative returns are not too rare for Berkshire (red dots in chart below), the magnitude of the drop is notable. Since November 7th, which was the last day Berkshire finished up on the day, the stock has declined by 29%. This is by far its largest percentage decline over a nine day period.
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A log scale would probably show a more accurate picture. It will likely result in a similar conclusion, but is more consistent with your comment "...by far the largest percentage decline ..."
Posted by: DonB | November 20, 2008 at 12:57 PM