NEW YORK (TheStreet) -- Stocks are trading near record levels, but the bull market still has plenty of room to run.
Changes in technology and the economy that permit businesses to use capital far more efficiently will likely drive equities much higher.
In the industrial era, Henry Ford had a great idea -- an inexpensive assembly-line vehicle, but he needed vast amounts of capital and decades to erect factories and dealerships to build out its full potential.
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used the free Internet to convert its novel search engine into a global company on an initial investment of $25 million. In 2004, just six years after it was founded, the company's search engine was available on computers worldwide and its stock was worth $23 billion, a 900% return.
Henry Ford got rich, but hardly as rich or as quickly as Google founders Larry Page and Sergey Brin did, because in the digital era, ideas are worth so much more than machines.
In the digital economy, innovators don't need a lot of money to create a valuable new company, and even old-line industrial companies can use factories, manage supply chains and service products far more efficiently and need less cash to grow.
Consequently, big U.S. companies are flush with billions in cash and too few opportunities to deploy it. Along with individual investors, they bid up prices for young companies, whose owners are looking to cash in on their initial success, and pay huge sums for IPOs of companies such as Twitter
. And many big companies have bought back large blocks of their own stock.
Taken together, those pushed stocks to record levels and drove down yields on dividend-paying stocks and the interest paid on bonds and bank CDs.