During 1983 our book value increased from $737.43 per share to $975.83 per share, or by 32%. We never take the one-year figure very seriously. After … - Warren Buffett

" "

During 1983 our book value increased from $737.43 per share to $975.83 per share, or by 32%. We never take the one-year figure very seriously. After all, why should the time required for a planet to circle the sun synchronize precisely with the time required for business actions to pay off? Instead, we recommend not less than a five-year test as a rough yardstick of economic performance. Red lights should start flashing if the five-year average annual gain falls much below the return on equity earned over the period by American industry in aggregate.