United States Steel Corporation (NYSE:X) was the world's first company to surpass the market capitalization mark of $1 billion dollars. In the early 1900s, John Piermont Morgan wanted to do for steel what he had done in railroads. The only problem was that Andrew Carnegie controlled the biggest and most efficient producer of steel, Carnegie Steel. Morgan worked with Charles Schwab to convince Carnegie to sell his business into the new entity envisioned by Morgan, U.S. Steel. Carnegie, already pondering retirement, agreed to sell to the Morgan-headed trust for an overall price of about $492 million in stocks and bonds of the new company. Carnegie went on to focus on philanthropy while Schwab became the president of U.S. Steel.
Unfortunately for Schwab, U.S. Steel was an ungainly welding of mediocre businesses onto Carnegie Steel's lean frame. To bring the rest of the company up to snuff, U.S. Steel needed to raise huge amounts of capital. In 1901, Morgan issued $303 million in mortgage bonds, $510 million in common stock, and $508 million in preferred stock—creating a total capitalization of approximately $1.4 billion—on a company with real assets of $682 million. Thus, half of its worth was goodwill, but the public bought into the overvalued securities.
U.S. Steel would never fulfill its potential and, although Schwab's management postponed the reckoning, saw its market share eaten up by hungrier companies, including Schwab's Bethlehem Steel, formed when he left U.S. Steel in frustration. In fact, one of the owners of U.S. Steel's disappointing shares was Benjamin Graham's widowed mother. Watching the family's wealth shrink with the shares might have motivated the intelligent investor to focus on hard assets and intrinsic value, discounting egregious amounts of goodwill.
This question was answered by Andrew Beattie.