2019-01-28: 36 Stocks Moving In Monday's Mid-Day Session. Mid-Morning Market Update: Markets Open Lower; Caterpillar Profit Misses Expectations. Nvidia Cuts Q4 Sales Guidance, Chips Stocks Tumble. Shares of NVIDIA are trading lower after the company cut Q4 guidance, citing weaker sales in its gaming and datacenter platforms.. VanEck Vectors Semiconductor ETF Down 2.4% Following Q4 Sales, Gross Margin Guidance Cut From NVIDIA. NVIDIA Shares Down 9% Following Q4 Sales, Gross Margin Guidance Cut; AMD Shares Down 4.3%, Seagate Down 3.2%, Micron Down 2.5%, Intel, Western Digital Down 1.5%, Texas Instruments Down 1%. NVIDIA Guidance Cut Reflects 'Weaker Than Forecasted' Sales Of Its Gaming And Datacenter Platforms,. NVIDIA Cuts Q4 Gross Margin Guidance From ~62.5% To ~56.0%. NVIDIA Cuts Q4 Sales Guidance From $2.7B To $2.2B vs $2.7B Est.