And even without a near-20% drop, there have been periods in just the last three years for US stock market investors that were less than exuberant.
Investors were cheered by strong company earnings, the expanding economy and hopes that the United States and China could resolve their trade dispute.
While the Dow Jones Industrial Average rose by 0.25%, the Nasdaq Composite managed a 0.49% surge.
Overall, the widely watched Dow Jones Industrials is well past 25,000 and some believe it could reach 30,000 before the bull market ends. The Nasdaq composite slipped 10 points, or 0.1 percent, to 7,878.
"The stock market loves the Trump agenda. Nine and-a-half years later, and the S&P 500 has rallied about 323 percent.
Asian stock markets were mixed Thursday after US and Chinese officials held talks on their deepening trade dispute ahead of a new round of tariff hikes. "Anything that's damaging to Donald Trump's agenda is not going to be good for the stock market", said Stephen Massoca, senior vice-president at Wedbush Securities in San Francisco.
ENERGY: U.S. benchmark crude rose $1.16 to $67 per barrel in electronic trading on the New York Mercantile Exchange.
The current bull market began amid the emergency steps taken by the Federal Reserve, which set ultra-low interest rates and sought to spur investment further with billions of dollars in bond purchases in a program known as "quantitative easing". The Russell 2000 was last up 1.2 percent.
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Retailers were in focus again and several of them were moving after reporting their latest quarterly results.
Hormel Foods, which makes Spam and other products, fell 3.1 percent after cutting its outlook, partly because of uncertainty around trade.
Medtronic rose 4.6 percent after the medical device maker's profit beat estimates.
Advancing issues outnumbered declining ones on the NYSE by a 1.88-to-1 ratio; on Nasdaq, a 2.32-to-1 ratio favored advancers.
The S&P consumer discretionary index .SPLRCD climbed 1.0 percent as off-price retailer TJX Companies Inc TJX.N rose on strong results and Toll Brothers Inc's TOL.N encouraging quarterly report boosted shares of homebuilders.
The S&P isn't the only index that has prospered.
US crude oil rose again and is up 5.9 per cent this week.