When the price of Apple stock hit a then-record high in October 2018, among the shareholders counting their gains were 43 Republicans in Congress, who collectively owned as much as $1.5 million worth of the tech giant’s shares. Apple’s stock jumped 37 percent in its run-up to that record. Several variables were behind the climb, including higher-than-expected earnings.

But congressional Republicans themselves had a hand in the spike, stock analysts say. Legislation they championed — the 2017 Tax Cuts and Jobs Act — doled out nearly $150 billion in corporate tax savings in 2018 alone. One effect: a big boost in stock prices.

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