The S&P 500 is about to cap off a streak it hasn’t seen since the tech bubble

It's been an easy few years to make money.

Barring a late Friday plunge, the second quarter of 2017 will go out as the S&P 500's 16th winning quarter out of the past 18. The large-cap index has risen by 2.7 percent in the three-month period.

Throughout the whole history of the S&P 500, which dates back to 1928 if the performance of the earlier S&P 90 is incorporated, there have only been six prior four-and-a-half-year periods in which the S&P 500 rose in 16 quarters or more. All of them came in the periods that ended between the fourth quarter of 1998 and the first quarter of 2000, according to a CNBC analysis of FactSet data.

That is to say, the S&P 500 hasn't performed this dependably since the dotcom bubble.

Yet while today's quarterly streak is the same as yesteryear's, the qualitative performance is very different. The S&P 500 has risen by about 70 percent since the end of 2012. Contrast that with the S&P 500's 156 percent rise over the same amount of time the last time such a win streak was seen, in the four years ended in the first quarter of 2000. Or the startling 199 percent gain in the same amount of time concluding at the end of the second quarter of 1999.

Still, looking forward, strategist Max Wolff of 55 Institutional says the streak is about to be broken.

"The S&P is and has been overbought for a long while. It should slump," Wolff wrote in a Thursday email to CNBC's "Trading Nation." "We expect the summer or early fall to mark the end of the run."

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Trading Nation is a multimedia financial news program that shows investors and traders how to use the news of the day to their advantage. This is where experts from across the financial world – including macro strategists, technical analysts, stock-pickers, and traders who specialize in options, currencies, and fixed income – come together to find the best ways to capitalize on recent developments in the market. Trading Nation: Where headlines become opportunities.

Sara Eisen

Sara Eisen joined CNBC in December 2013 as a correspondent, focusing on the global consumer. She is co-anchor of the 10AM ET hour of CNBC's "Squawk on the Street" (M-F, 9AM-11AM ET), broadcast from Post 9 at the New York Stock Exchange.

In March 2018, Eisen was named co-anchor of CNBC's "Power Lunch" (M-F, 1PM-3PM ET), which broadcasts from CNBC Global Headquarters in Englewood Cliffs, N.J.

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