The 52-week high in EEM is also 25 percent below its all-time high of 55.83 touched in October 2007. In contrast, the S&P 500 trades about 1 percent from its all-time high.
The 8 percent drop in the U.S. dollar index on the slower-than-expected pace of Federal Reserve tightening is also a major factor in the emerging market stocks' strong gains. Many emerging market countries hold large amounts of dollar-denominated debt, and a weaker dollar makes those debts less costly to pay off.
But this time, analysts note economic fundamentals and technological developments are contributing to the rally as well.
Patterns of emerging market stocks' internal outperformance during periods of dollar weakness has been "significantly disrupted during the 2017 dollar decline," Geoff Dennis, head of global emerging market equity strategy at UBS, said in an Aug. 7 note. "The biggest disrupter in 2017 to the normal pattern of relative sector performance at times of dollar weakness has been the very strong rally in IT."
Dennis pointed out that emerging markets information technology stocks were up 43 percent for the year through July, versus emerging markets' 23.7 percent gain over that time.
Even among U.S.-listed technology stocks, some of the best performers have been Chinese tech giants such as Alibaba and NetEase.
"You do have extraordinary growth" in emerging markets, Seymour said. "You do have tech that's leapfrogging other kind of legacy systems, and I think frankly you have more and more sophisticated central bankers and financial ministers In every EM economy in the world."
Most importantly, China's economy is stabilizing and the country's corporate earnings are growing.
"China's a very important part of this. If you don't believe in China I think it's going to be difficult to believe in EM," Seymour said.
The country's stocks have the greatest weighting in the MSCI emerging markets index at nearly 29 percent. This year, MSCI also finally said it would include some of the mainland Chinese-traded stocks in the benchmark index.
IShares MSCI Emerging Markets ETF (EEM) performance from 2003 - 2017
The International Monetary Fund on Tuesday revised its estimate for Chinese economic growth in 2017 to 6.7 percent from 6.2 percent this year. For the next four years, the IMF raised its average growth forecast for China to 6.4 percent from 6 percent.
China's Securities Times said that as of Tuesday, 615 companies listed on the Shanghai and Shenzhen exchanges have reported 20.9 percent year-on-year earnings growth in the first half of the year to 146.08 billion yuan ($21.8 billion).
"We've not had it this good in the last six or seven years," said June Chua, portfolio manager at Hong Kong-based Harvest Global Investments, which had $114.25 billion in assets under management at the end of March. "It's the first time in a while we've had a sustained earnings recovery. I think if this trend can continue it can actually be a case of China gaining international attention again and gathering flows in terms of global asset allocation."
To be sure, worries persist about how China's debt-fueled growth may be unsustainable.
There is also still the chance the Federal Reserve could raise interest rates more quickly than markets expect, strengthening the U.S. dollar and increasing pressure on emerging markets.
"The biggest risks are that central banks move too quickly," Seymour said.WATCH: MSCI inclusion: One small step for China A-shares