Reliance Industries just had one of its best days on the stock market in years. Shares jumped close to 8% after the company reported its Q2 FY27 results on 30 October, taking the stock to an intraday high of around Rs. 1,259 and pushing the company's market capitalisation above Rs. 17 lakh crore. In rupee terms, that single session added more than Rs. 1 lakh crore to Reliance's valuation, the sharpest single-day move for the stock since April 2020.

What is interesting is that the headline growth story this time was not Jio or Retail, the two businesses that usually dominate the Reliance earnings conversation. It was the old, less glamorous Oil-to-Chemicals segment, the one most retail investors tend to think of as a slow, cyclical business, that did the heavy lifting.

The numbers that moved the stock

Reliance's consolidated revenue for the September quarter came in at Rs. 3.62 lakh crore, up 28% year-on-year and the highest ever for the company in a single quarter. Consolidated EBITDA touched a record Rs. 62,409 crore, up close to 24%, while net profit after tax rose nearly 34% to Rs. 29,550 crore. Profit before tax climbed over 32% to Rs. 38,613 crore.

These are not small beats, they are genuinely the strongest quarterly numbers in the company's history. For a company of Reliance's size, where a 1% revenue surprise already means thousands of crores, a quarter this strong across almost every major segment is rare.

Why O2C was the real story

The Oil-to-Chemicals business is Reliance's refining and petrochemicals arm, and it is usually seen as the steady, lower-growth part of the group compared to the consumer-facing Jio and Retail businesses. This quarter flipped that script completely.

O2C revenue grew 44.2% year-on-year to Rs. 2.32 lakh crore. More strikingly, O2C EBITDA jumped 67.9% to Rs. 25,203 crore, up sharply from Rs. 15,008 crore in the same quarter last year. That is close to a 68% jump in profitability from a single segment, which is an extraordinary number for a business this size. Management noted that the first-half FY27 run rate puts the O2C segment on track for an annualised EBITDA of over Rs. 80,000 crore, a scale that would have seemed ambitious even a year ago.

The driver behind this was a sharp improvement in refining margins and product cracks, essentially the spread between what Reliance pays for crude oil and what it earns selling refined products and petrochemicals. We have tracked this crude oil story through the year, including the period when oil prices spiked and cracked above $100 a barrel, in our piece on what crude at $108 means for Indian portfolios. For a refiner like Reliance, higher and more volatile crude prices, somewhat counterintuitively, often translate into wider margins on the refined products side, which is exactly what played out this quarter.

How the different segments stacked up

Segment	Revenue growth YoY	EBITDA growth YoY
O2C (Oil-to-Chemicals)	44.2%	67.9%
Jio Platforms	11.4%	16.6%
Reliance Retail	Modest growth	Profit declined around 24%
Consolidated group	28%	23.9%

Notice that Retail actually had a weaker quarter, with profit slipping roughly 24%. This matters because it shows the rally was not a broad-based "everything is great" reaction, it was specifically an O2C-led story that was strong enough to overshadow softness elsewhere in the group. Jio had a solid, if less dramatic, quarter too, with its 5G subscriber base crossing 300 million during the period, alongside its own market milestone in the form of its recent IPO listing, which we covered in detail in our piece on reasons to hold Jio shares beyond listing day.

The single-day market cap move, visually

What brokerages are saying

The sell-side reaction has been largely positive. Goldman Sachs reportedly sees meaningful further upside in the stock following the results, and Jefferies has reiterated a Buy rating on the back of the O2C strength. The shift in brokerage tone is notable because Reliance had spent much of the year trading in a relatively narrow range while the market waited for a clear catalyst, and this quarter appears to have provided one.

It helps that this result landed in a period where domestic institutional buying has been a consistent force in the market, something we examined in our piece on how DII buying has been absorbing FPI selling this year. A stock as heavily weighted in the Nifty as Reliance getting a genuine earnings-led re-rating tends to have an outsized effect on the index itself, not just the company.

The balance sheet picture

Beyond the headline profit numbers, a few balance sheet details are worth noting. Cash and cash equivalents rose to around Rs. 2.68 lakh crore from Rs. 2.30 lakh crore a year earlier, giving the company a large cushion. Net debt actually declined marginally to Rs. 1.17 lakh crore from Rs. 1.19 lakh crore, even as outstanding debt rose to Rs. 3.85 lakh crore from Rs. 3.48 lakh crore, reflecting continued heavy capital expenditure.

Capex for the quarter came in at Rs. 38,153 crore, directed mainly toward new energy capacity, retail network densification for quick commerce and hyper-local delivery, and further O2C expansion. This is a reminder that Reliance is still very much in investment mode across multiple businesses simultaneously, even while delivering record profits from its existing operations.

Is the O2C strength sustainable

This is the question that will decide whether the rally holds or fades. Refining margins are inherently cyclical and tied closely to global crude oil dynamics, including supply disruptions, OPEC decisions and geopolitical events. We have covered several of these swings through the year, from the period when crude touched multi-year lows in our note on crude's first sub-$100 close since the Iran war, to broader moves in which Indian sectors win and lose when oil trades between $100 and $120.

The honest answer is that nobody can predict with certainty whether refining margins stay this strong next quarter. What management's guidance of an annualised Rs. 80,000 crore EBITDA run rate for O2C suggests is that the company itself expects a good part of this strength to persist through the rest of FY27, but that is a forecast, not a guarantee. Investors holding or considering Reliance should treat this quarter as evidence of what the business can deliver in a favourable margin environment, not as a permanent new baseline.

What this means for retail investors

For long-term holders, this quarter is a reminder that Reliance is genuinely a diversified conglomerate, and different parts of the business take turns driving performance. A few quarters ago it was Jio and Retail carrying the growth story while O2C lagged, this quarter the roles reversed almost completely. That diversification is one of the reasons the stock tends to hold up reasonably well even when one segment has a soft patch, as Retail did this quarter.

If you are tracking Reliance in the context of the broader index, it is worth remembering how much weight the stock carries in the Nifty, which means a move like this has ripple effects across index funds, ETFs and anyone holding the broader market rather than just the stock directly. For a refresher on how index weightage works and why a single stock's earnings can move the whole market, our guide on Nifty 50 sector weightage is a useful read.

Frequently Asked Questions (FAQ)

1. How much did Reliance's market cap rise after Q2 FY27 results?

Reliance Industries' market capitalisation rose by more than Rs. 1 lakh crore in a single session, crossing Rs. 17 lakh crore, after the company posted record Q2 FY27 earnings.

2. What drove Reliance's strong Q2 FY27 results?

The Oil-to-Chemicals segment was the biggest driver, with EBITDA up 67.9% year-on-year on the back of improved refining margins and product cracks.

3. Did all of Reliance's businesses perform well this quarter?

No. While O2C and Jio Platforms posted strong growth, Reliance Retail's profit actually declined by around 24% during the quarter.

4. Is the O2C segment's strong performance likely to continue?

Management has guided toward an annualised EBITDA run rate of over Rs. 80,000 crore for O2C, but refining margins are cyclical and depend heavily on global crude oil dynamics, so this is not guaranteed.

5. What was Reliance's consolidated net profit in Q2 FY27?

Reliance reported a consolidated net profit of Rs. 29,550 crore for Q2 FY27, up approximately 34% year-on-year and an all-time high for the company.