US-China Rivalry Reshapes Global Supply Chains: Why 'Home Court Advantage' Is the New Alpha

If you wanted a textbook case of how geopolitics now runs the show in global markets, look no further than the latest tremors in the supply chain narrative. The US-China rivalry, once a background hum for risk managers, is now the main event. Traders who still think 'global diversification' means buying a few emerging market ETFs and calling it a day are about to get a masterclass in home bias, whether they like it or not.

The market is waking up to the reality that the world’s two largest economies are not just decoupling, they’re actively weaponizing their supply chains. This is not your garden-variety trade spat. The 'Great Powers' are back, and they’re not playing nice. Russia’s ongoing war in Ukraine, the US’s saber-rattling with Iran, and China’s increasingly aggressive posturing in the South China Sea have all conspired to make global supply chains less a matter of efficiency and more a matter of national security. The result? Investors are scrambling to figure out which portfolios have a 'home court advantage', and which are about to get dunked on by the next round of tariffs, export bans, or outright embargoes.

Let’s get granular. The S&P 500 Momentum Index is on a tear, powered by semiconductor stocks that have become the new oil in this era of digital cold war. According to MarketWatch, the index just delivered its best two-month gain on record. But beneath the surface, there’s a growing sense of unease. The May labor market is expected to be weak, with consensus forecasting a mere 96,000 jobs added, and some analysts whispering about the possibility of negative job creation. Meanwhile, the Fed is openly discussing the prospect of another rate hike, even as PMI and regional Fed data suggest the economy is losing steam.

Against this backdrop, the UK’s bond market is sounding the alarm about rising government borrowing and political uncertainty, while legacy tech stocks are staging an AI-fueled comeback. It’s a market where the old playbook, buy the dip, trust the global cycle, ignore the noise, no longer works. The noise is the signal now.

The US-China rivalry is not just a headline risk. It’s a structural shift that’s already reshaping capital flows, corporate strategy, and, yes, your portfolio. Supply chain 'onshoring' is no longer a theoretical talking point. It’s showing up in earnings calls, capital expenditure plans, and, crucially, in the relative outperformance of US and EU stocks with domestic supply chains. The days of the 'borderless' corporation are over. Welcome to the era of the fortress balance sheet.

The move to home court advantage is not just about risk management. It’s about alpha generation. Companies that can control their supply chains, secure critical inputs, and navigate the new regulatory minefield are being rewarded with premium valuations. Those that can’t are being punished, sometimes brutally. The divergence is most obvious in tech, where US semiconductor giants are riding high on government subsidies and export bans, while their global competitors scramble to adapt to a world where access to advanced chips is now a matter of national interest.

But this is not just a tech story. It’s playing out across sectors, from autos to healthcare to defense. The UK’s bond market jitters are a reminder that even supposedly 'safe' assets are not immune. Rising government borrowing costs are a direct consequence of the need to fund domestic industrial policy, social spending, and, yes, defense. The fiscal math is getting harder, not easier.

So what’s the trade? The easy answer is to overweight US and EU stocks with domestic supply chains and underweight those with heavy China exposure. But the real opportunity is in the second-order effects. Think about the suppliers to the suppliers, the logistics firms, the infrastructure plays. There’s a reason why momentum strategies are working: the market is rewarding companies that can pivot quickly and punish those that can’t.

Strykr Watch

From a technical perspective, the S&P 500 Momentum Index is flirting with overbought territory, but the trend remains your friend, at least for now. Key support sits at recent breakout levels, with resistance defined by the upper bounds of the two-month rally. Watch for any signs of reversal in semiconductor leadership, as this would be the canary in the coal mine for a broader momentum unwind. In the UK, rising yields are putting pressure on gilts, with the 10-year flirting with levels not seen since the Brexit referendum. Political risk is back on the table, and the bond market is pricing it in.

On the macro side, keep an eye on the upcoming Fed Logan speech and Beige Book release. Any hint of hawkishness could trigger a sharp selloff in risk assets, especially those most exposed to global supply chains. The May labor market report is a wild card. A negative print would upend the current narrative and force a rethink of the Fed’s path.

The real risk, though, is not in the data. It’s in the narrative. If the market decides that the US-China rivalry is not just a cyclical headwind but a secular shift, expect a wholesale repricing of assets. The days of buying global and forgetting about it are over.

The bear case is straightforward. If the US or China escalates the conflict, think new tariffs, export bans, or even military action, the market will not wait for confirmation. The selloff will be swift and brutal. On the other hand, any sign of de-escalation would trigger a relief rally, but don’t bet on it. The incentives for both sides are to keep ratcheting up the pressure.

For traders, the opportunity is in the volatility. Momentum strategies are working, but they’re crowded. Look for rotation into under-owned sectors that benefit from the home court advantage theme. Infrastructure, defense, and logistics are all in play. Don’t chase the leaders, find the laggards with improving fundamentals.

Strykr Take

The US-China rivalry is not a sideshow. It’s the main event, and it’s only getting started. The market is rewarding companies and sectors that can adapt to the new reality of fragmented supply chains and rising geopolitical risk. The easy money has been made in the obvious trades. The next leg up will come from those who can spot the second-order effects and position accordingly. Stay nimble, stay skeptical, and don’t fall for the old playbook. This is a new game, and the rules have changed.