Why Stocks Go Up and Down

Pike wrote an introductory text explaining how corporate securities work and what determines their prices, aimed at readers with no financial background. It has been revised through several editions, later with co-author Patrick Gregory.

The structure follows a company through its financing life. Pike starts with a small business raising money, introduces common stock and what a share represents, then adds debt, preferred stock and convertible securities, explaining in each case what the holder is entitled to and what happens in trouble. He builds the balance sheet and income statement from the transactions of the company being described rather than presenting them as abstract forms, which makes the accounting section unusually concrete. He then covers earnings per share, book value, dividends, and the ratios investors use, before turning to bond pricing, yield, the relationship between interest rates and bond prices, and finally to what determines stock prices.

The treatment of stock valuation is conventional: prices reflect expected future earnings discounted at a rate that varies with interest rates and perceived risk, so stock prices move on changes in expected earnings, in interest rates and in risk appetite.

The book is a primer and does not attempt to be more. It contains no original argument and no advanced material on options, derivatives or portfolio theory. Its value is that the explanations are genuinely clear and the accounting is built up from transactions rather than asserted. Readers with a finance background will find nothing new.