Apple and Wall Street have enjoyed a pretty good friendship over the years. The company went public on December 12th, 1980 and the initial offering created more millionaires than any IPO in U.S. history. The company has always been covered by a large number of brokerage house analysts and Apple normally has kept its distance from forecasts and estimates produced by them. But Apple is now embroiled in a fight with one of the Street’s giant investment houses, Goldman Sachs.

Goldman analyst Hall says Apple’s accounting for the free TV+ trial will result in a “material negative impact” on earnings which Apple denies

The analyst says that the accounting choice made by Apple will increase the revenue of its services unit, as we just pointed out. He said, “Effectively, Apple’s method of accounting moves revenue from hardware to services even though customers do not perceive themselves to be paying for TV+.” This is also important for Apple because it has had a long-standing goal of doubling revenue in the services unit from the $25 billion it generated in 2016 to $50 billion next year. During its fiscal second quarter, the most recently released by Apple, the services unit brought in a record $11.5 billion. The addition of Apple Arcade and TV+ could get the company to its goal of $50 billion in services revenue next year.

Because Hall believes that the free one-year trial of Apple TV+ will have a “material negative impact” on earnings, the analyst cut his 12-month target price on the stock to $165 from his previous $187 target. The brokerage firm has been looking for a decline in the shares, which closed Friday at $218.75 after declining nearly 2% following the dissemination of Goldman’s research report.

A so-called Chinese wall at investment firms is supposed to separate the research arm from the fee-generating investment banking unit. This wall keeps Wall Street firms from releasing too many bullish reports on a company in the hope that it will earn some underwriting business from said company. But in this case, the wall worked as it should; the Goldman analyst issued a bearish report on Apple that knocked down the value of the tech giant. Still, there would be nothing illegal if Apple decided to give its next underwriting assignment to say, Morgan Stanley or Bank of America’s Merrill Lynch unit because of this disagreement.

For those who aren’t purchasing a new iPhone, Apple TV+ will cost $4.99 a month (with access for up to six people) after a one-month free trial. The service starts on November 1st.