Wall Street cautious ahead of Nvidia and Jackson Hole
US stock index futures were sharply lower overnight as investors reacted to a broadly tech-led selloff across the major Asian-Pacific indices. But buyers soon came in to take advantage of the dip, and the index performance became more nuanced as the European session progressed.

Source: TN Trader
However, there was still some notable weakness across the tech sector. Micron and Marvell Technologies were both down over 3% mid-morning, while Advanced Micro Devices and Arm were down 1.7% and 2.2%, respectively. All these chip stocks tend to follow NVIDIA (unchanged) which will deliver its quarterly earnings after the close on Wednesday.
These could be a major test for the AI trade, particularly as investors question whether the pace of AI-related growth can justify increasingly expensive valuations and whether demand from major tech customers remains strong enough to support the current scale of infrastructure spending.
Meanwhile, investors are also having to consider government bond yields amongst developed countries, many of which are trading at, or near, multi-year highs. This reflects concerns over sticky inflation and tepid growth, along with ever-increasing government debt.
Last week US federal debt rose above $40 trillion for the first time, and investors are concerned about interest costs on this. Just to add another wrinkle, rising government debt comes against a background where investors are being offered the opportunity to buy bonds issued by the hyperscalers, and other AI-adjacent corporations, to fund the rollout of AI infrastructure products.
Meanwhile, escalating US-Iran tensions are adding to the uncertainty. The Strait of Hormuz remains closed, and, no matter what the Trump administration claims, it would appear that Iran has ultimate control over it.
Later today, US Treasury Secretary Scott Bessent is expected to announce a set of sanctions on Tehran designed to lead to the 'collapse' of the Islamic regime. Separately, last week Mr Bessent announced a shift in Treasury purchases of government bonds in an effort to reduce yields at the long end of the curve.
While initially successful, yields subsequently bounced back in a move which must be somewhat humiliating for Mr Bessent, raising speculation that he may have another go. Bear in mind, that he joined Japan's Ministry of Finance in an intervention to strengthen the yen/weaken the dollar at the end of last month. That too has unwound to some extent.
The backdrop was further complicated by trade tension after President Trump imposed 50% tariffs on $20 billion of Canadian goods following the collapse of trade talks, with Canada announcing reciprocal measures. This week also sees the Fed's annual Jackson Hole Economic Symposium. This starts on Thursday with Fed Chair Kevin Warsh due to deliver the keynote speech on Friday afternoon.

















