Indian Energy Exchange (IEX)

November 2025 Update:

Exchange Filing

Few highlights and takeaways

Total Volume: total traded volume increased by 17.7%(yoy), showing growth and structural reliance on the exchange platform.

  • ​RTM Dominance: RTM volume was strong at 4,233 MU, growing by 40.2% (yoy).

  • ​Structural Shift (TAM): The Term-Ahead Market (TAM) with excellent growth of 243.1% YoY, indicating the shift by utilities away from traditional contracts to short-duration trading.

  • ​Market Prices: Prices declined by 6.9% (DAM) and 9.2% (RTM), a positive signal, and will lead to better supply liquidity—driven by renewables??

  • ​Day-Ahead Market (DAM): Volume was stable at 5,668 MU up 0.3% yoy, showing that while the traditional segment is steady, market growth is being driven by the high-growth RTM and TAM segments.

Overall a positive business update, though the decline in REC trading (volume decreased by 13%) is something to be watchful, as these are part of the long-term strategy and tied to the growth of green energy trading. Also, looking forward to the outcome from Jan 6th hearing on Coupling/CERC fight.

Disclaimer: Invested and biased (~ 5% of PF). Not a reco., consult a registered advisor before any investment decisions.

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i am seeing there is substantial increase in DAM volumes in December, almost hovering around 200 MUs and RTM as well but a slight increase.. this is a good sign for IEX, with IGX also hitting the IPO market. IEX seems better placed than what is was few months back.

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any specifics, or reference to this? how do you have access to December data?

we get daily update from IEX, Daily Trade Details Update
DAM Trade
Delivery Date: 5 Dec 2025
Volume (MU)
Buy | Sell | Cleared
402 | 489 | 193

Price Avg (Rs/kWh)
RTC | Peak | Night | Day
4.38 | 5.75 | 3.03 | 4.74

G-DAM Trade
Delivery Date: 5 Dec 2025
Volume (MU)
Buy | Sell | Cleared
142 | 37 | 27

Price Avg (Rs/kWh)
RTC | Peak | Night | Day
4.64 | 6.18 | 3.84 | 4.42

RTM Trade
Delivery Date: 4 Dec 2025 upto 5:30 PM
Volume (MU)
Buy | Sell | Cleared
133 | 215 | 105

Price (Rs/kWh)
Min | Max | Avg
1.96 | 10.00 | 3.93

Click ‘STOP’ to stop receiving updates

but i thought this should be in the website as well

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This is interesting. How to we read Buy|Sell|Cleared data? do the customers pay for orders as well settlement separately?

@bajji_s
I have tried to gather monthly cleared units in thousand MU.
Can you please review if this makes sense ?
If you would notice Feb,April,Dec. are months when cleared volume spikes.
Also I noticed RTM units are rising quicker comparatively.
Units cleared.xlsx (19.5 KB)
D- Invested

Tried to reason on how the whole market coupling issue would look from a buyer/seller of power and personally dont think it would be so easy to convince users to switch from IEX even when coupling is done due to following reasons: -

  1. Most users would like access to RTM market as well in case their DAM bid don’t go through, so no way they completely get out of IEX until even RTM markets are coupled. Why would any rational decision maker be willing to pay two annual fixed fees when one offer (DAM+RTM) is clearly better than other (only DAM)?

  2. Power Exchanges unlike Stock Exchanges operate 365 days (even when there is banking holiday) funds/margin has to be credited beforehand to settlement account of Exchange to ensure the buyer’s bid goes through. Even if users want, they can’t move margin from one exchange to other easily.

  3. Why would any rational decision maker agree to lock in addition cash at another exchange, when the price discovery will be the same as at IEX and additionally same money can be used for RTM bids in case DAM bids don’t go through.

4.IEX charges 2p/unit, that is less than 1% of value of power traded, why would any rational decision maker, risk uncertainty and take on additional work of managing margin on multiple exchanges to save 0.5 or 1p/unit?

The last point is the key reason that differentiates IEX from other monopoly businesses. IEX captures so little value of what it creates for its customer that no case of abuse of dominance against IEX can be made.

Looking forward to APTEL hearing in January. Gut feels says that IEX would receive a favourable order in best case and a longer duration trail run by CERC in worst case.

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Thanks for providing all relevant points.
I have a small feedback for point 4
The amount may seem small at 2p/unit. But it adds to a significant cost for high volume.also it should be compared to the savings accrued by switching to alternate method(in this case another exchange) and the efforts and costs required. Every company would want to save money and thus maximise profit.smaller but obvoius savings will definately be tried and explored for maximising profits.

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I disagree.

Businesses such as bolts, fasteners in auto industry have pricing power and very high stickiness. The rationale being that component cost is too low compared to cost of the car and reliability is very important, even a small error will wipe out all the savings for carmaker.

I think parallels exist for IEX and power buyers/sellers. Even if the rival exchanges offer a 50% discount to IEX charges, a 1/400 error will wipe out the entire gain for power buyer/seller.

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Can you explain more on these errors which are supposed to be catastrophic?

Disc: tracking with no position

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Lets say there is a hypothetical seller who sells 1 MU everyday at cost of Rs 4/unit and when he switches from IEX to other exchange he saves 1 p/unit. For the next 400 days he executes the same trade and saves - Rs 4 million (4001MU0.01 Rs/unit). On the 401st day, if transaction fails and he losses Rs 4 million.

A failure rate of less than 1 per year, i wouldnt call castastrophic. But most executives would avoid such risk because explaining this to Board/CFO is very difficult without coming across as a nincompoop.

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great points. Additionally, I believe it is not easy to change UI/UX once you develop familiarity and comfort on a platform. After zerodha, i opened lot of other broker accounts but could not shift my trading away to others with lower charges because UI/UX of zerodha is very good and i am used to it. This may play out with IEX as well for some section of users.

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Can you elaborate why failure of transaction leads to loss of money? Shouldnt the money still be with buyer if transaction not completed. Is this happening in broader market such as NIFTY or Sensex?

have seen your previous posts also in this thread, different perspective on how human behavior works

  1. Can you please explain why would a user lose $4 million on the 401st day if a transaction fails on another exchange? sorry if dumb question as I am in learning phase
  2. If a bid is initiated by buyer/seller but no matching counterparty exists, does the initiator pay charges to the exchange? though my understanding is like NSE/BSE exchange market orders, each order price is dependent on demand/supply and thus each buyer will meet some seller(atleast 99.9% of the time) and vice versa also holds true but still wants to get it clarified
    Disc: invested with tracking position

Refer Abhishek Sinha’s post for more understanding but very briefly unlike other markets if the power isnt traded it cant be stored. So either the power is curtailed or worse case DISCOM charges you a penalty for destabilizing the grid by injecting more than scheduled power.

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My further thoughts on IEX.

Bear Case:

  1. IEX loses 50% market share due to market coupling
  2. Regulator forces IEX to reduce transaction charges (2 paisa per unit) to half (1 paisa per unit)
  3. Market in its collective wisdom, reduces valuation multiple to half from current levels.

Bull Case:

  1. Overall available electriciry market increases from current 1800 BU to 3000 BU over next 5-7 years.
  2. Short term trading continues gaining market share , from 7% current to 20% , 7 years from now, and IEX continues to lead its market dominance.
  3. IGX where IEX will hold 25% after its IPO, continues to grow.

Based on my limited understanding, Bear case pointers have low probability but very high implications.

Bull case on the other hand has high probability, and to some extent can offset the bear scenarios, if bear case possibilities turn out true.

Disclosure - Invested and Biased.

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Below is a clean, investment-oriented interpretation of the uploaded newspaper article and its direct relevance to IEX’s business model and long-term moat.


1. What the article is fundamentally saying (in simple terms)

The article’s core argument is:

In a modern electricity system dominated by renewables, only transparent market-based price signals can manage complexity.

Key points made in the article:

  • Earlier electricity systems were stable because coal + long-term planning + fixed tariffs dominated.

  • The transition to renewables (solar, wind) has made electricity:

    • Variable (supply fluctuates hourly)
    • Decentralised
    • Harder to manage through central planning alone
  • When prices are distorted or suppressed, systems break:

    • Payment failures
    • Utility losses
    • Theft
    • Underinvestment
    • Grid stress
  • Examples cited (implicitly/explicitly):
    Pakistan, Texas power crisis, Indian DISCOM stress.

  • The conclusion:

    Price discovery through markets, not administrative control, is the only sustainable solution.


2. Why this article is highly relevant for IEX (big picture)

This article is not about IEX directly, but it strongly validates IEX’s core thesis.

IEX exists precisely to solve the problem described:

Problem described in article What IEX does
Renewable supply is variable Real-time & day-ahead markets
Central planning fails Market-based price discovery
Subsidised tariffs distort signals Competitive bidding
Demand-supply mismatch DAM, RTM, TAM, DAC
Grid instability Short-term balancing via exchanges

The article is essentially an academic / policy endorsement of power exchanges.


3. Key themes from the article → Direct IEX linkage

A. “Only prices can solve complexity”

  • Renewables make supply unpredictable.
  • You cannot centrally plan every fluctuation.

IEX relevance:

  • DAM & RTM allow hourly and sub-hourly price discovery.
  • RTM becoming larger than DAM (as you’ve observed) is exactly this transition in action.

Investment implication:

Structural tailwind for RTM volumes → monopoly product for IEX.


B. “Suppressing prices creates hidden damage”

The article explains that keeping tariffs artificially low leads to:

  • DISCOM losses
  • Deferred payments
  • Theft
  • Underinvestment

IEX relevance:

  • Exchange prices reveal the true marginal cost of power.
  • LPSC rules + URS mandates push surplus power onto exchanges.
  • DISCOMs increasingly rely on exchanges instead of opaque bilateral deals.

Investment implication:

As regulators accept market prices, exchange liquidity must rise, not fall.


C. “Central planning breaks down with renewable penetration”

The article highlights:

  • Solar midday oversupply
  • Evening shortages
  • Curtailment risk

IEX relevance:

  • Explains why:

    • Daytime prices collapse
    • RTM volumes surge
    • Need for Peak DAM / Peak RTM (which IEX has already petitioned for)
    • BESS arbitrage markets become essential

Investment implication:

IEX is positioning ahead of the curve (Peak markets + BESS integration).


D. “Markets are needed, but must be well-designed”

The article doesn’t say markets alone are enough.
It says:

  • Design matters
  • Price signals must be trusted
  • Governance must be strong

IEX relevance:

  • Explains why:

    • Market coupling is debated but delayed
    • Regulators are cautious
    • DAM is first, RTM later
  • Supports management’s view that implementation will take time.

Investment implication:

Market coupling risk is long-dated and execution-heavy, not an overnight disruption.


4. How this strengthens the IEX investment thesis

Structural, not cyclical, relevance

The article makes it clear:

  • This is not a temporary phase
  • It is a permanent shift in how electricity systems work

That directly benefits:

  • Exchanges
  • Price discovery platforms
  • Short-term balancing mechanisms

IEX sits at the center of this architecture.


5. What this means for key IEX debates you are tracking

Debate Article’s implicit stance
Market coupling Risk of over-centralisation; caution needed
RTM vs DAM RTM must grow as variability rises
Long-term PPAs Insufficient alone in renewable era
Power derivatives Needed to manage volatility
BESS + peak markets Inevitable evolution

The article supports IEX management’s narrative, not contradicts it.


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All is relevant if battery storage BESS does not succeed in big way ..

Recently GOVT is forcing Renewable +BESS combo so that they can provide assured supplies like any Fossils fuel Plant .. If local level optimisation is ensured then PPA can still be good options for DSCOMS to cover their base demand and Exchanges will manage peak or occasional surge demand ..

Lets see how power sector generation evolves

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