Tesla Model 3 vehicles are loaded onto a truck for transport at the company's manufacturing facility in Fremont, California, on Wednesday, June 20, 2018.

Investors should buy shares of Tesla, Molina Healthcare and Agilent Technologies because they will get a boost from their upcoming earnings reports, analysts at Morgan Stanley said in a note.

Morgan Stanley named these stocks among their "Theme Picks" with a "positive catalyst" heading into their earnings releases.