The article discusses significant analyst calls on wall street, including upgrades and downgrades for various companies such as nvidia, nike, and alibaba, highlighting their market positions and growth potential.

Morgan Stanley reiterates nvidia as overweight heading into earnings.

Jefferies upgrades nike to buy from hold, stating the brand remains robust.

BMO upgrades block to outperform from market perform, seeing a compelling entry point.

Morgan Stanley upgrades twilio to overweight from equal weight, citing compelling shares.

Morgan Stanley upgrades alibaba to overweight, stating it is now a preferred pick.