It's interesting that in 1929 AT THE HEIGHT OF THE BUBBLE.... a P/E of 20 was considered to be ...HIGHLY SPECULATIVE!
BUT TODAY...A P/E OF 20 IS CONSIDERED TO BE ...WELL, RATHER CHEAP...!
IF ALL HELL BREAKS LOOSE IN WALL STREET?
IT MIGHT JUST BE THAT LITTLE CONUNDRUM THAT IS BEING "RATIONALIZED...!"