The Dow surges through 18,000, as the economy grows at its fastest pace in more than a decade.

History was made on Wall Street, as The Dow topped the 16,000 mark for the first time ever. S&P 500 also reached a new high, as it briefly surpassed 1,800. Both indexes are up more than 20 percent this year, but what does this all mean? Our panel of experts has analysis.

Another massive drop on Wall Street. We explore what's behind the latest stock market tumble.