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Today's charts: Buffett bets big on Bank of America; Nike shares jump; RadioShack files suit against Sprint

Yahoo Finance is tracking Bank of America, Berkshire Hathaway, Nike, Sprint and Micron Technology in intraday trading on Friday.

Bank of America (BAC) – Warren Buffett’s Berkshire Hathaway (BRK-A) is swapping its preferred shares in Bank of America to buy 700 million common shares once the bank raises its quarterly dividend to 12 cents per share. The move will make the Oracle of Omaha’s company the bank’s largest shareholder.

Nike (NKE) – The athletics apparel maker topped Wall Street expectations after the bell on Thursday, reporting earnings per share of 60 cents on revenue of $8.68 billion. Analysts were calling for EPS of 50 cents and revenue of $8.63 billion. Nike also confirmed its partnership with Amazon (AMZN) on a call with analysts, saying that it will sell a limited assortment of products on the e-commerce giant’s platform. Nike’s stock is down about 6% over the past three months.

Sprint (S) – RadioShack creditors have filed a lawsuit against Sprint, accusing the wireless carrier of using confidential information from its partnership with the company to open competing stores. The lawsuit, which alleges that Sprint killed nearly 6,000 RadioShack jobs, seeks $500 million in damages.

Micron Technology (MU) – The chip maker’s third-quarter results topped analysts forecasts. Micron Technology reported earnings per share of $1.62 on revenue of $5.57 billion after the bell Thursday. Shares of Micron Technology are up about 43% since the start of the year.

For more on Friday’s big stock movers, check out the Final Round, live at 4 p.m. ET, right here on Yahoo Finance.