Tin prices jumped to 22-month highs on Monday as the market fretted over supplies from Indonesia and sliding stocks in warehouses approved by the London Metal Exchange (LME).

Traders said profit-taking on long tin positions betting on higher prices weighed on the market later in the session. Benchmark tin traded 1.8% down at $34,950 a metric ton in official rings, having peaked at $36,050 for its highest since June 2022.

Concern about exports from Indonesia, which accounts for roughly 18% of global supplies of the soldering metal, and disruptions in Myanmar, the world's second-largest producer of mined tin, are behind the price surge.

"There's a lot of nervousness about supplies, and stocks on the LME have been falling for some time," one tin trader said, adding that expectations of stronger demand also helped to create upward price momentum.

Tin stocks in LME warehouses have nearly halved to 4,190 tons since December and are at their lowest since July last year, suggesting shortages.

Tight supply has also caused the premium on the LME cash tin contract against the three-month contract to jump to levels last seen in July, having stood at a discount earlier this month. The premium was last around $340 a ton.

LME data shows one company holding more than 40% of open interest -- the number of outstanding contracts due to mature or be rolled over at the next settlement date -- on long tin futures contracts for May.

Elsewhere, prices of stainless steel ingredient nickel hit seven-month highs at $19,550 a ton on escalating worries over output in top exporter Indonesia, which accounts for more than half of global supplies.

Market talk of Chinese plans to buy nickel for state stockpiles also supported prices on Friday.

Nickel was down 0.6% at $19,200 a ton.

In other metals, copper gained 0.2% to $9,900 a ton, aluminium eased 0.3% to $2,660, zinc retreated 1.3% to $2,814 and lead was down 1.9% at $2,177.

(Reporting by Pratima Desai; Editing by David Goodman)