The S&P 500 (^GSPC) opened lower on Tuesday thanks to a decline in tech stocks and concerns about when the Federal Reserve will start cutting rates. It's a different story for bitcoin (BTC-USD), however, with the cryptocurrency notching a new all-time high.  Alibaba (BABA) shares are on the move. The Chinese internet giant is one of the companies investing in Chinese AI startup MiniMax, according to a report from Bloomberg.  Stitch Fix (SFIX) shares are trading lower after posting a wider-than-expected loss in the second quarter. The online styling company also cut its full-year sales outlook. AT&T (T) received an upgrade to Outperform from Peer Perform at Wolfe Research, which cites the telecom's fundamentals and the fact that it's paying down debt and becoming more efficient. Shares of SoFi Technologies (SOFI) are falling sharply after announcing a new debt offering. Yahoo Finance's Brad Smith and Seana Smith break down some of Tuesday's trending tickers. For more expert insight and the latest market action, click here to watch this full episode of Yahoo Finance Live. Editor's note: This article was written by Stephanie Mikulich.

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