Here are Thursday's biggest calls on Wall Street: JPMorgan reiterates Amazon as overweight JPMorgan said growth deceleration concerns are overdone. Stifel upgrades FedEx to buy from hold Stifel said FedEx shares are compelling at current levels. JPMorgan reiterates Credit Suisse as overweight JPMorgan said it's standing by shares of the banking giant. JPMorgan upgrades Motorola Solutions to overweight from neutral JPMorgan called the telecom equipment company "high quality." Bank of America upgrades Takeda Pharmaceuticals to buy from neutral Bank of America said called Takeda a "stable value stock."

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