Check out the companies making headlines in afternoon trading. Dollar General – Shares of the discount retailer fell about 32% after the company cut its full-year sales and profit guidance. Dollar General CEO Todd Vasos said the softer sales trends are partly due to a core customer feeling “financially constrained.” The retailer also reported disappointing results for its fiscal second quarter. Shares of competitor Dollar Tree fell more than 10% out of sympathy. Confirm – Shares rose about 32% after buying now, pay later the company’s stronger-than-expected revenue outlook for its fiscal first quarter. Affirm expects revenue for the period to be between $640 million and $670 million, above the $625 million expected by analysts surveyed by LSEG. Best Buy – Shares rose about 14%. Best Buy raised its earnings outlook for the fiscal year. The company now expects an adjusted profit margin of $6.10 to $6.35 per share. That is higher than the previous range of $5.75 to $6.20 per share. Results for the second fiscal quarter were also better than expected. Nutanix – The stock rose more than 20% following the cloud infrastructure company’s earnings and revenue decline in its fiscal fourth quarter. Nuatanix earned an adjusted 27 cents per share on revenue of $548 million. Analysts had expected earnings of 20 cents per share on revenue of $537 million, per LSEG. Okta – Shares of the secure identity cloud platform fell more than 17%. Okta’s billings came in at $651 million, lower than analysts’ consensus estimate of $679 million, according to StreetAccount. Bank of America double downgraded the stock to Underperform from Buy, based on Okta’s financial results. Birkenstock – The sandals business fell more than 16%. Birkenstock reaffirmed its full-year revenue guidance and expects growth of approximately 19%. However, adjusted fiscal third-quarter earnings fell short of Street expectations. Pure Storage – Shares of the data storage company fell 15.8%. Pure Storage provided third-quarter operating revenue guidance that was lower than analyst estimates. For the current period, Pure Storage expects operating income of $140 million, while analysts polled by FactSet estimate $148.1 million. Nvidia – Shares fell more than 6% despite the chip giant beating The Street’s expectations for its fiscal second quarter. Nvidia reported adjusted earnings of 68 cents per share on revenue of $30.04 billion. Analysts polled by LSEG expected 64 cents per share on revenue of $28.7 billion. However, the AI darling’s third-quarter revenue forecast fell short of investors’ high expectations. Veeva Systems – The cloud computing company rose nearly 9% after its fiscal second quarter earnings and revenue exceeded The Street’s expectations. Veeva reported adjusted earnings of $1.62 per share on revenue of $676.2 million. Analysts expected revenue of $1.53 per share on revenue of $667.8 million, according to FactSet. Crowdstrike – Shares rose nearly 3% after the cybersecurity company posted stronger-than-expected earnings and revenue for the latest quarter. However, Crowdstrike lowered its full-year outlook following last month’s global outage. HP Inc. – HP shares rose 2%. Fiscal third-quarter revenue came in better than expected at $13.52 billion, above the consensus estimate of $13.38 billion per LSEG. Adjusted earnings of 83 cents per share fell just short, while analysts called for 86 cents per share. Victoria’s Secret – Shares of the lingerie company fell 3.7%. While the company has raised its full-year guidance, it still expects net sales to decline 1% year over year. An earlier forecast predicted a decline in the low single digits, and analysts surveyed by LSEG estimated a decline of 2.8%. – CNBC’s Samantha Subin, Yun Li, Pia Singh and Hakyung Kim contributed reporting.