Key Highlights:

  • Both stocks were among 16 additions to the S&P/ASX 300 in the September quarterly rebalance, effective before the open on 21 September 2026.
  • Lindian closed at $0.63 on 24 September, down from about $0.86 in mid-August, as the market waits for first rare earths production at Kangankunde.
  • Core Lithium fell 7.7% to 38.8 cents on 24 September after a 12% jump the day before, with lithium prices down sharply since mid-May.
  • Upcoming company updates and execution against stated plans remain central to the next phase for both stocks.

Lindian Resources and Core Lithium joined the S&P/ASX 300 on 21 September, but both have spent parts of September giving back ground. Lindian has slipped well below its August levels as investors weigh execution risk in Malawi, while Core Lithium's pullback looks more like a short, sharp Reversal tied to a sliding lithium price than a change in its restart story.

Index entry arrives amid choppy critical minerals trade

S&P Dow Jones Indices announced its September rebalance on 4 September, with changes taking effect before trading on Monday, 21 September. The S&P/ASX 300 added 16 companies, including Lindian and Core Lithium, and removed 14, among them fellow resources names Lotus Resources, Meeka Metals and Dateline Resources.

Index inclusion usually brings buying from passive funds, but much of that Demand is typically priced in before the effective date. After that, shares tend to trade on sector sentiment again.

The lithium backdrop has been tough in September. on 17 September, the lithium carbonate price was still up about 79% on a year earlier but had fallen 34% from its mid-May highs, including a 17% drop since 1 September as miners lifted supply. Over the month to that date, Liontown Resources, Mineral Resources and PLS Group had fallen between roughly 18% and 22%.

Lindian Resources (ASX:LIN) nears its production moment

Lindian is developing the Kangankunde rare earths project in Malawi, which it is positioning as a major non-Chinese source of magnet rare earths. In June the company said the project had reached Mining readiness, with first production targeted for the December quarter of 2026. Its update pointed to October commissioning and practical completion in mid-November.

When that milestone was announced, the shares closed at $0.88, lifting year-to-date gains to about 110%, . Since then, the trend has turned lower. Lindian closed around $0.86 on 11 August, $0.77 on 31 August and $0.64 on 3 September, and it finished at $0.63 on 24 September despite a 5.9% gain that day. That puts its Market Value at roughly $1.17 billion.

The retreat came even as Lindian announced a strategic Partnership with French group Carester on 3 September. The deal includes a 10-year binding offtake for 70% of the mixed heavy rare earth compound from its Kazakh processing joint venture, SARECO. It also sets out plans for an 8,000-tonne-a-year oxide separation plant in Kazakhstan, with a feasibility study targeted for the December quarter. Executive chair Robert Martin said the deal would help Lindian move "further downstream" and capture more value.

Lindian has no meaningful Revenue yet. As of late August, a recent net loss of $11.27 million and a price-to-book multiple of about 9.5 times. That was below its rare earths peers but well above the broader mining sector, so any slip in the commissioning timetable could weigh on the shares.

Core Lithium (ASX:CXO) restarts Finniss

Core Lithium owns the Finniss lithium operation near Darwin, which it placed on care and maintenance during the 2024 price slump. In March 2026 it raised $120 million to fund a restart. Mining is now underway at the Grants and BP33 deposits.

On 7 September Core reported the first spodumene concentrate from its recommissioned processing plant, within six months of its final Investment decision. Managing director Paul Brown called it "another significant milestone". the shares rose 7.6% to 35.5 cents the next day, taking year-to-date gains to about 30% and 12-month gains to around 238%. The company is also targeting a 20% lift in plant throughput to 1.2 million tonnes a year, with a first shipment planned for the December quarter.

Core has also been tidying up its portfolio. It announced the sale of its remaining lithium fines stockpile on 3 September. A day earlier, its gold and base metals spin-out, Axiant Resources, listed after raising $8 million, with Core keeping about a third of the shares.

The latest pullback has been sharp but brief. After jumping 12% on 23 September, Core fell 7.7% to 38.8 cents on 24 September after what as a busy morning of announcements. The day before, Citigroup entities had filed a notice that they were no longer substantial holders as of 22 September. Even after the fall, the stock remained near the top of its 52-week range of about 10 to 43 cents.

Different commodities, shared risk appetite

While the two stocks have been grouped together, their situations differ. Lindian has trended lower for more than a month from its August levels. Core's weakness in late September looks more like a partial reversal of a strong run, and the stock remains well ahead of where it began 2026.

What they share is timing and risk profile. Both are close to first production or first sales, both are valued at more than $1 billion before meaningful revenue, and both depend on volatile Commodity prices. Neither appears to have issued negative operational news, so the moves seem tied mainly to sector flows, profit-taking after big 12-month gains and post-rebalance volatility.

What investors could watch next

For Lindian, the key test is commissioning at Kangankunde, planned for October. Investors will also watch the oxide plant study and the September quarterly report, due by the end of October.

For Core Lithium, the focus is on ramp-up at Finniss, recoveries and costs. Timing and pricing of the first concentrate shipment, flagged for the December quarter, will also matter. More broadly, spodumene and lithium carbonate prices will shape sentiment across the sector.

The bottom line

Lindian and Core Lithium have pulled back in September, but not for the same reasons. Lindian has drifted lower from its August levels as production approaches, despite signing the Carester deal. Core's dip looks like short-term Volatility during a lithium price retreat, while its restart remains on schedule. For both, the next few months should show whether they can deliver.