A Snapshot in time- National Debt more than sum of ALL public U.S. Companies

I think we have reached a pivotal moment in time.  At least according to the best estimates I know of, it looks like our national debt has exceeded the market value of ALL public U.S. Companies!  I don't know what this means, but, it doesn't seem good....

According to the national debt clock, our national debt is now 

$10.27 trillion.

Whereas the value of all U.S. public companies, as shown by the Wilshire 5000 index (see live chart)  is about $9.12 trillion.