Notable analyst calls this week: Dell, Medtronic and T-Mobile among top picks

Core Insights - The S&P 500 closed positively on Friday, indicating a favorable market response to recent earnings reports from major companies [1] - The week saw declines in both the Nasdaq and Dow indices, with decreases of 2.7% [1] Company Performance - Nvidia's earnings report contributed to the positive sentiment in the S&P 500 [1] - Consumer giants Walmart and Target also reported earnings, influencing investor perceptions [1] Market Trends - The overall market experienced volatility, as evidenced by the declines in the Nasdaq and Dow indices during the week [1]