The crazy stocks that correlate with Apple

Say you want to get some extra exposure to the movement of Apple's stock, but you don't want to buy Apple directly. In that case, consider some surprising names with the highest correlation to the tech giant's share performance.

In the past year, Illinois Tool Works (ITW) has a 0.61 correlation to AAPL—the highest of any stock in the S&P 500. That means Apple and ITW tend to see their two stocks both move up -- or both move down together on the same day.

While it might seem surprising that the maker of Rain-X and Slime tops the list, the second-biggest business for ITW is its Test & Measurement and Electronics segment, at 15 percent of revenue, just behind its largest piece: auto components.

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ITW is followed by payments technology firm Fiserv (FISV) and industrial giant Honeywell (HON). Both of them have 0.59 correlations to Apple.

The numbers are based on an analysis from Kensho, a market data product.

Other big tech names are high, as well, such as Facebook (FB) and Texas Instruments (TXN), both at 0.55. Those make sense, given that Facebook is another huge tech firm, and TXN is a major supplier to Apple. Those reality checks make the following names even more surprising: Boeing (BA) at 0.57, Wells Fargo (WFC) at 0.58 and Blackrock (BLK) at 0.55—stocks that most people wouldn't expect to move so tightly with Apple.

It's a good bet that Apple's stock will rise today; it's increased in value nearly every time a new iPhone has been announced. But if you want to put your money against that theme, by looking for uncorrelated returns from Apple, consider energy names as a way to avoid everything tech.

Of the six S&P 500 stocks with the lowest correlation to Apple, five of them are energy names, such as Potomac Electric Power (POM), Diamond Offshore (DO), Range Resources (RRC), AGL Resources (GAS) and Newmont Mining (NEM). All of them have correlations under 0.10. Over the past year, obviously the path of Apple's stock has had nothing to do with energy names, but they have happened to yo-yo in different directions at the same time.

Read MoreA huge part of NASDAQ's risk comes from just these six stocks

Disclosure: NBCUniversal, parent of CNBC, is a minority investor in Kensho.