Investing.com -- US stock futures rose Monday, starting the new week on a positive note ahead of the release of key employment data.

Here are some of the biggest premarket US stock movers today:

• Microsoft (NASDAQ: MSFT ) stock rose 1% after the software giant announced plans to invest about $80 billion in fiscal 2025 on developing data centers to train artificial intelligence models and deploy AI and cloud-based applications.

• T-Mobile US (NASDAQ: TMUS ) stock fell 1% after downgrades from both RBC Capital Markets and Wells Fargo (NYSE: WFC ), both of which expressed concerns about the wireless carrier's valuation and decelerating growth.

• Lyft (NASDAQ: LYFT ) stock rose 4.6% after Benchmark upgraded the ride-hailing firm's stock to "buy" from "hold", with the stock’s 10% drop over the last month creating value.

• Citigroup (NYSE: C ) stock rose 2.1% after Barclays (LON: BARC ) upgraded its stance on the US banking giant to “overweight” from “equal weight”, citing “accelerating earnings growth, higher investment banking fees, healthy operating leverage, increasing ROTCE, greater capital return, and P/E multiple expansion.”

• AT&T (NYSE: T ) stock rose 0.6% after RBC upgraded its stance on the telecoms giant to “outperform” from “sector perform”, citing greater confidence in growth initiatives and shareholder return prospects.

• Plug Power (NASDAQ: PLUG ) stock rose 5.7% after the US Treasury Department issued rules for getting tax credits for hydrogen fuel produced with nuclear energy.

• Boeing (NYSE: BA ) stock rose 1.8% after the aircraft manufacturer appointed Dana Deasy as the company's new Chief Information and Digital Officer.

• MicroStrategy (NASDAQ: MSTR ) stock rose 4.2% after the business-software company unveiled its plans to issue $2 billion in preferred stock to raise the funds needed to buy more bitcoin.