The old VIX (now VXO) shot above 50 after 9/11 and in the July/October 2002 period. It was as high as 43 or so during the lows last March. Then new VIX back extrapolated probably will have these peaks in the low 40'. The VXN really spiked to close to 100 in the 9/11 event, but subsequent lower lows in the indices in July, October 2002 were in the 65/72 range.