2012 Reprint of 1919 Edition. Exact facsimile of the original edition not reproduced with Optical Recognition Software. A groundbreaking study of investment psychology. When this book was originally published in 1912 Selden's idea that movements of prices on the exchanges are dependent to a very considerable degree on the mental attitude of the investing and trading public was still a novel notion. It is now an established fact. Though published in 1912 Selden's book could have been written yesterday. This makes complete sense as the main topic - human psychology - has not changed at all in the past century.