L&F (066970) gained 8.83% on 31 August to close at ₩146,700, the biggest move on the Korean market that day. The company filed nothing. What moved it, according to Edaily, was a report that SK On had won a large US energy-storage battery order, and L&F is one of the cathode suppliers that would feed it.
That is worth pausing on. A ₩5,968.4bn company moved nearly nine percent on a contract signed by somebody else, disclosed by nobody, for volumes that have not been quantified in any document L&F has filed. It tells you what this stock is currently trading on. It is not trading on the June quarter, and the June quarter is the more interesting thing.
Second-quarter revenue was ₩885.0bn, up 70.2% from ₩520.1bn a year earlier and up 19.7% from the March quarter. On almost any read that's a good result.
Operating income over the same sequence went ₩117.3bn to ₩20.8bn. A drop of 82% on a 19.7% revenue gain. The operating margin went from 15.85% to 2.35%, and gross margin from 19.55% to 5.16%.
Something in the first quarter was not repeatable. In a cathode business the usual candidate is lithium price lag — you buy carbonate, you convert it, you sell at a metal-linked price weeks later, and when the input price rises through the quarter your inventory gains dress up the margin. When it stops rising, the dressing comes off. The half-year report doesn't isolate that effect in the lines I can see, so I'm inferring, and I'd rather say so than pretend the number explains itself.
What I'm confident about is the direction. Five of the six quarters on file show revenue rising and the sixth was flat. Margin has done nothing so consistent: minus 23.3%, then plus 13.4%, then plus 15.9%, then plus 2.4%. This company's revenue line and its margin line are not telling the same story, and the market is reading the revenue line.
Trailing twelve-month operating income through June is ₩242.7bn, an 8.38% margin on ₩2,894.8bn of revenue. That's a real recovery from the ₩558.7bn operating loss of FY2024.
Trailing net income over the identical four quarters is negative ₩323.3bn.
The whole of that ₩566bn swing sits below the operating line, and most of it is financing. Finance costs were ₩228.0bn in the fourth quarter of 2025 and ₩191.5bn in the first quarter of 2026 — each larger than the operating profit of any quarter this company has ever produced. In FY2025 finance costs of ₩430.5bn were nearly three times the ₩156.8bn operating loss. The June quarter finally showed a finance cost credit of ₩4.5bn, which is why net income turned positive at ₩52.9bn, the only profitable quarter in the eight on file.
I would not extrapolate that credit. A negative finance cost line is usually a mark-to-market reversal on convertible instruments or derivatives, not a lower cost of money, and reversals go the other way when the share price does. This stock is up from a 52-week low of ₩61,300 to ₩146,700. That's the sort of move that produces exactly this kind of swing in either direction.
Here is the plainest fact in the filing. At 30 June, current assets were ₩1,832.1bn and current liabilities were ₩2,452.3bn. Working capital is negative ₩620.2bn and the current ratio is 0.75.
Total liabilities of ₩2,905.1bn sit on ₩779.4bn of equity, a ratio of 3.73. For comparison, POSCO Future M — a company in the same business writing off similar mistakes — carries ₩4,891.0bn of liabilities on ₩4,713.6bn of equity, a ratio of 1.04. L&F is running roughly three and a half times the leverage of its nearest listed peer.
The equity got thin the hard way. FY2023, FY2024 and FY2025 produced net losses of ₩194.9bn, ₩380.7bn and ₩534.7bn, ₩1,110.3bn in three years, against a company whose equity peaked at ₩1,285.3bn. Cash at 30 June was ₩360.6bn.
One line I can't reconcile: retained earnings were negative ₩75.8bn at the December year-end and positive ₩230.5bn three months later, despite a ₩65.3bn loss in between. That is a ₩306bn increase that did not come from profit. The likely explanation is a transfer from capital surplus to clear the accumulated deficit, which is routine in Korea and changes nothing economically. But it isn't stated in the lines on file, and anyone reading equity as a solvency measure should know the number moved for a reason other than earnings.
The one part of the working-capital picture that's genuinely improved is stock. Inventories were ₩764.0bn at 30 June against ₩576.9bn a year earlier, up 32.4% while revenue rose 70.2%. Inventory is growing at less than half the rate of sales, which after the FY2023 disaster — ₩1,163.4bn of inventory against collapsing prices — is the discipline you want to see.
Receivables are the other side. ₩591.3bn against ₩271.3bn a year ago, up 117.9%, growing faster than revenue. Some of that is timing on a quarter that ended strong. If it persists into September it means terms are loosening, and a company with negative working capital funding a customer is a company borrowing to do it.
Capex has been cut to almost nothing: ₩51.7bn in the quarter, against ₩482.0bn spent in the whole of FY2023. Operating cash flow was positive ₩70.2bn. The company is generating just about enough to stand still.
There is no price-to-earnings ratio here because trailing earnings are negative. At ₩146,700 the shares trade at 7.66 times the ₩779.4bn of book value and 2.06 times trailing revenue. Book multiples that high normally attach to companies earning well above their cost of capital, and this one hasn't earned a full-year profit since FY2022.
The bull case is straightforward and not silly: US energy storage is scaling fast, L&F sits in the supply chain of cell makers winning that business, and a company with 3.73 times leverage delivers more upside per unit of demand than a conservatively financed one. Leverage cuts both ways and right now it is cutting the right way.
The bear case is the same sentence read backwards. If the second-quarter margin, not the first-quarter margin, is the normal one, then ₩885.0bn of quarterly revenue produces about ₩83bn of annualised operating profit against a debt load whose finance costs ran ₩430.5bn last year. That does not work.
Two numbers in the third-quarter report. First, gross margin: if it holds near 5% while revenue grows, the first quarter was an inventory gain and this is a low-margin toll converter with too much debt. If it recovers toward 13-15%, the June quarter was the anomaly.
Second, the finance cost line. A second consecutive credit means something structural changed in the capital stack. A return to ₩150bn or more means the June net profit was a rounding accident.
And watch the ownership filings. Four large-holding reports have been filed since 30 June, three of them in August. Somebody is repositioning, and the half-year report doesn't say who.
kstock reads DART every morning and writes up what moved — the contract, the buyback, the number that does not add up. The daily post and a Saturday roundup, by email.