Today's biggest winners and losers in the stock market.

On this episode of Stock Movers:

- Arm Holdings (ARM) shares tumbled in late trading after the chip designer’s sales forecast disappointed investors, who have grown more skeptical of companies tied to artificial intelligence in recent days. Fiscal fourth-quarter revenue will be about $1.47 billion, the company said Wednesday in a statement. Though analysts predicted $1.4 billion on average, some projections topped $1.5 billion, according to data compiled by Bloomberg. Profit will be 58 cents a share, excluding certain items, compared with a 56-cent estimate.

- Alphabet (GOOGL) shares rise in afterhours trading after the company topped projections for quarterly revenue and outlined an ambitious capital spending plan, far surpassing predictions, leveraging its growth to build out the data centers and infrastructure needed to lead in the AI age.

- Qualcomm (QCOM) shares sink in late trading after the largest maker of smartphone processors, gave a lackluster revenue forecast for the current period, stoking concern that component shortages will hurt consumer demand by driving prices up. The shares dropped in extended trading.