Stocks making the biggest moves midday: chevron, caterpillar, sunpower and more

In this article * WOOF * SHEL-GB * CVX * SPWR * ENPH Follow your favorite stocksCREATE FREE ACCOUNT A sign is posted in front of a Chevron gas station on July 31, 2020 in Novato, California.

Justin Sullivan | Getty Images _Check out the companies making headlines in midday trading._ Shell — Shares of Shell popped 2.7% after the company announced it was stopping all spot

purchases of Russian crude oil. Shell also apologized for buying a heavily discounted consignment of Russian oil. Dick's Sporting Goods — Shares of the sporting goods giant jumped 2.1%

after the company reported profits and sales growth in its holiday quarter that topped analysts' estimates. Dick's also offered a better-than-expected forecast for 2022 earnings

and same-store sales, which it says sets a baseline for future growth coming out of Covid-19. Enphase Energy, SunPower — Enphase Energy and SunPower rose 10.8% and 18.7%, respectively, as

rising oil prices resulting from the Russia-Ukraine conflict continue to shift attention toward alternative energy sources. President Joe Biden also announced Tuesday a ban on Russian oil

and gas imports. Chevron, Exxon Mobil — Traditional energy stocks are up as oil prices continue to rise, and the U.S. announced a ban on Russian oil and gas imports in response to its war on

Ukraine. Shares of Chevron and Exxon rose 5.2% and 0.8%, respectively. Dish Network — Shares of the telecom company jumped 5.2% on Tuesday after Dish received an upgrade from UBS to buy.

UBS said in a note to clients that Dish's spectrum holdings are undervalued and provide a backstop against downside risk for the stock. Apple — Apple shares fell 1.2%. The tech giant

held its first launch event of the year on Tuesday. The company announced a new affordable iPhone, an update to the iPad Air and its latest, most powerful Mac chip. Caterpillar — Shares

rallied 6.8% after Jefferies upgraded the stock to a buy rating from a hold rating. The firm said the surge in commodities prices sparked by Russia's invasion of Ukraine could boost

Caterpillar's performance.  Petco —  Shares of Petco rose 8% after the company beat analysts' estimates on the top and bottom lines in the fourth quarter. The pet retailer also

issued strong revenue guidance for 2022. Okta — Shares rallied more than 3.3% after Mizuho upgraded the stock to a buy rating from neutral. Mizuho said the cybersecurity firm is

"difficult to ignore."  ThredUp — Shares of ThredUp closed 0.8% lower after the company reported weaker-than-expected quarterly results. The company posted a loss of 18 cents per

share versus the Refinitiv consensus estimate of 17 cents per share. ThredUp's revenue met analysts' estimates, but the company's first-quarter revenue guidance came in lower

than expected. _— CNBC's Yun Li, Jesse Pound and Maggie Fitzgerald contributed reporting_