So how will that divergence resolve itself?
"It is Oppenheimer's judgment that a garden-variety sell-off of six to nine percent in the S&P 500 is overdue and imminent," Worth wrote to CNBC.com. "And the sell-off we've seen in gasoline over the past eight weeks is a harbinger of things to come for the S&P."
Anthony Grisanti of GRZ Energy notes that the problem is clear. "Something is going to give one way or another," Grisanti said. "Either equities will break lower, or gasoline will go higher."
Still, he's less concerned about what it could mean for the market, because he believes that both gasoline and the market are pretty much where they should be. "Gasoline is trading on fundamentals," Grisanti said, "and so are stocks."
(Read More: VIX Is Getting Ready to Take Market on a Ride)
Others say that in this environment, falling gas prices are actually a good thing. That's because they keep inflation at bay, and thus allow the Fed to continue easing without creating inflation for consumers. In fact, the Consumer Price Index reading for March actually dropped due to falling gas prices.
That's why, in the view of KKM Financial CEO Jeff Kilburg, "Cheaper gas should fuel Bernanke's QE assault vehicle to stay on the road longer and go much further than originally thought."
Michael Block, chief equity strategist at the Phoenix Partners Group, also believes that falling gas prices are a good sign. "It's good news for the U.S. consumer and for the inflation story," Block said. "I am not convinced at all that it's a sign of something bad for the consumer. What I do know is that it is making the consumers' wallets fatter."
— By CNBC's Alex Rosenberg
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