Rubber prices took divergent paths on Thursday, with Japan's benchmark contract climbing on the back of a jump in oil prices, while China's main natural rubber contract slipped as traders weighed sluggish restocking at the country's tire factories.
On the Osaka Exchange, the March rubber contract settled up 0.71% at 452 yen per kilogram. In Shanghai, January natural rubber fell 0.53% to 19,530 yuan a ton, even as December butadiene rubber, a synthetic product, rose 0.8% to 15,730 yuan.
Oil's push and pull
The initial driver was oil. Crude prices rallied more than $2 a barrel after renewed Houthi attacks on Saudi Arabia raised fresh worries about supply disruption. Because synthetic rubber is made from oil-based inputs, higher crude can lift its feedstock costs, making natural rubber more competitive by comparison.
But whether that cost push spreads across the market depends on demand. Everbright Futures, a Chinese brokerage, noted that China's tire factories only recently reopened after a holiday and are still ramping up production, keeping inventories and restocking subdued.
Supply is also tightening. Everbright said output in key Southeast Asian regions has missed expectations, and Zijin Tianfeng Futures pointed to limited production in southern Thailand, where aging rubber trees are becoming less productive.
Official data underscored the demand challenge: China's rubber tire output fell 3.3% year-on-year in September to 100.85 million units, a reminder that weak end-demand can outweigh cost pressure in the near term.
What it means for investors
This is a classic case of cost shock versus demand timing. When crude rises, synthetic rubber often reacts first, since producers' oil-linked inputs get more expensive, which helps explain butadiene's gain.
Natural rubber can benefit through substitution, but only if tire makers are actively rebuilding inventories. With restocking still slow, the market can end up with a wider spread: synthetic prices firming on costs while China's natural rubber stays capped by near-term consumption.
That gap can squeeze tire makers' margins until they can raise tire prices or run plants harder, and it also explains why Osaka and Shanghai contracts can diverge even with the same global supply story.
For everyday investors, the split is a reminder that commodity prices don't move in lockstep. Even within the same market, different contracts can tell different stories depending on whether they're driven by input costs or end-user demand. Watching how tire makers respond—whether they pass on costs or absorb them—will be key to seeing how this plays out.
Related coverage: oil prices slip despite fresh tanker attacks and energy stocks slip as oil and gas pull back.
