In fact, the market's string of stoicism is downright historical.
The S&P has failed to close lower by 1 percent or more since Oct. 11, for the longest such string of not-down-1-percent-plus days since the one ended in December 1995. Notably, 1995 was an incredibly quiet year for the market — earlier in 1995, the S&P went 110 days without a 1 percent drop, according to a CNBC analysis of FactSet data.
Before that, the longest such streak was in 1985, when 112 straight non-1-percent drops were enjoyed.
Unsurprisingly, both 1985 and 1995 were glorious years for the market, with the S&P rising 26 percent and 34 percent, respectively. Yet 1995 makes the better comparison to the current period.
While the S&P saw several 1 percent rises in 1985, it only moved by 1 percent or more on 13 trading days in all of 1995. Similarly, the S&P 500 has only moved by 1 percent or more on one day since early December.
Michael Block, chief strategist at Rhino Trading Partners, credits the recent streak to "an overlying sense that nothing bad is allowed to happen," partially due to optimism about President Donald Trump's stated tax cut, deregulation and infrastructure plans.
Investors have the sense that "a miracle is coming, and I'm not going to say it's not — but it's being priced in, clearly," Block told CNBC in a Tuesday phone interview.
In the meantime, "everyone's been lulled into buying every shallow dip," so that the larger dips simply don't happen, the strategist explained.
The true test for the market's indefatigability may come on Wednesday, when the Federal Reserve is widely expected to increase its short-term rate targets.