GCM Resources (LSE:GCM) is currently the fastest growing penny stock on the London market over the past month.
The share price has soared 512% since 25 July, jumping from around 3p to 21.5p. That means just a £1,000 investment a month ago would be worth £6,120 today!
But thinking about what could have been is pointless — the question is, will it keep climbing?
I took a closer look at what’s driving this rally and whether the shares deserve a spot on a UK investor’s watchlist.
What does GCM Resources do?
Listed on London’s AIM index, this up-and-coming mining company operates the Phulbari Coal and Power Project in north-west Bangladesh. It recently identified a JORC-compliant coal resource of 572m tonnes at the site, with around 472m tonnes potentially recoverable.
Another key factor behind the rally was news last week from Bangladesh’s finance minister, Amir Khasru Mahmud Chowdhury. Speaking in the capital Dhaka, he said the government is finalising the national energy mix, with coal-based power generation under active consideration.
Naturally, this is great news for GCM Resources, but the company warned that nothing has been finalised yet.
So how do the numbers look?
Like many early-stage micro-cap stocks, the business is still loss-making. However, its most recent interim results show narrowing losses of £1.012m, down from £1.302m a year earlier.
This was likely helped by a drop in administrative costs from £461,000 to £411,000. Meanwhile, it raised approximately £2.25m in two post-period placings in January and February 2026 to bolster working capital.
On the balance sheet, things look relatively healthy. A debt-to-equity ratio of 15.88% indicates low leverage, while a current ratio is 1.72 suggests adequate short-term liquidity.
| Key metric | Value |
|---|---|
| Market cap | £63.7m |
| Debt-to-equity | 15.88% |
| Current ratio | 1.72 |
| Loss after tax (H126) | £1.012m |
But that doesn’t make it risk-free.
Where investors should be cautious
With a market capitalisation of just £63.7m, GCM Resources is a classic high-risk/high-reward penny stock. It suffers from low liquidity and it has no historical track record of profitability.
For the 2025 financial year, the company reported a net loss of approximately £2.15m and continues to operate without revenue.
On top of that, mining is an inherently unpredictable industry, and operating overseas adds regional, political and foreign exchange risk.
The Phulbari project has faced public opposition and controversies for over a decade, and remains entirely dependent on securing approval from the Government of Bangladesh.
Needless to say, while the potential is there, this is not an obvious winner.
Final thoughts
After five years of barely any movement, this rally is a big development for GCM Resources. The 572m tonne coal discovery is no small feat, and renewed government interest in coal could unlock significant value.
The Phulbari project could support up to 6,600MW of power generation capacity, meeting nearly 60% of Bangladesh’s current thermal coal demand. But until approvals are granted and revenue flows, this remains a speculative bet on political momentum.
For UK investors looking to diversify into smaller energy plays, a small position is worth considering. But only as part of a much larger, diversified portfolio — never bet more than you can afford to lose on a penny stock.
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Mark Hartley does not hold any positions in the companies mentioned.
This story originally appeared on Motley Fool
