Rocket Companies, Lyft, Michaels, Ambarella & more

Check out the companies making headlines in midday trading. 

Rocket Companies – The online mortgage provider’s stock dropped close to 20% after a surprise rally in the previous session as analysts urged caution in the heightened speculative trading in the shares. The stock soared more than 70% Tuesday for its best day ever on no apparent news. Rocket is one of the most heavily shorted names by hedge funds, which may have made it attractive to the Reddit trading crowd.

Lyft – The ride-sharing company’s shares climbed more than 8% after the company said the last week of February was its best week…