What Microsoft’s $4 Trillion Market Value Really Means

We are entering a Golden Age of big business. Or, depending on how you look at it, a Dark Age for small business. Economic concentration is rising almost everywhere, from Main Street to Wall Street, where Microsoft Corp. this week became the second company to reach a $4 trillion market capitalization after Nvidia Corp. In fact, nine of the 10 of the world’s largest companies are based in the US and all are worth at least $1 trillion. And despite the efforts of anti-trusters, this trend will only continue.

Why? For all the handwringing about market power and concentration from both the left and the right of the political spectrum, lawmakers continue to enact policies that benefit big businesses at the expense of their smaller competitors.

Sure, big businesses have always made up a large share of employment. But its dominance over American industry in all its forms has only grown the last 30 years. This is about more than a few big firms leading the S&P 500 Index. Fewer small companies are able to go public these days, and those who do sell at a discount . The number of listed companies in the US had shrunk to some 4,000 right before the pandemic from about 7,000 in 1996.

BB Marching higher graph

Think about it: Most consumers doing work around the house these days will head to their local Home Depot first instead of the local mom-and-pop hardware store – if any are still around. And the home you may be renting? There’s a good chance it is owned by a Wall Street private-equity firm and not a local landlord. What about those tariffs the Trump administration is imposing on imports? Unlike smaller firms, big business is in a better position to absorb the extra costs rather than pass them on to their customers.