Johnson & Johnson products on a shelf in a store in New York.

Lucas Jackson | Reuters

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A rough earnings season continues as Wall Street analysts downgraded a bunch of stocks on Tuesday. They include Johnson & Johnson, Roku, Square, Ferrari, and more.

Here are the biggest calls on Wall Street on Tuesday:

Morgan Stanley upgraded Quest Diagnostics to ‘overweight’ from ‘equal weight’

Morgan Stanley said in its upgrade of the lab company that it sees more upside in the stock due to the coronavirus.

DGX positioned to meaningfully benefit as market shifts to phase II of COVID-19 testing. While shares have outperformed since earnings, we see

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