"I think it's more reasonable to say the odds are we didn't make a major top because most of the time we're not making a major top. Those are hugely rare events," Ritholtz Wealth Management CEO Josh Brown said.
However, he acknowledged that the market tends "to have clusters of massive deals around tops, whether it's M&As or IPOs. This is true."
In an article published Tuesday, MarketWatch Senior Columnist Mark Hulbert cited market historian Hayes Martin's concerns about overly bullish investor sentiment and overvalued small-cap stocks, as well as their divergence from large caps.
Hulbert, who said he has thought the market was near a top for some time, said the price divergence "is one of the most glaring parts of why the market may be on weak ground, and that is it's relying on fewer on fewer companies to keep going, and that's not a healthy condition."
OptionMonster's Pete Najarian brushed off the idea that the market had peaked last week after Alibaba raised $25 billion in its initial public offering.
"I think that's the most ridiculous thing I've ever heard in my life," he said. "I continue to look at what's been working. … It's been about big caps all year."