You have been long a midcap for four months on a perfectly ordinary trend signal. On a Tuesday morning the board announces that the company will merge into a larger listed company, and the scheme fixes the exchange ratio: three shares of the acquirer for every eight shares held here. The stock gaps up, your position is well ahead, and you leave it alone. Over the following months the chart does something you have never seen it do. Its daily range collapses to a third of what it was. It stops responding to its own sector. And on two separate days it falls four per cent on no news whatsoever — no news about this company, at any rate. Nothing is broken. From the day the ratio was fixed, the line on your screen has been describing a different company.
A flat is agreed for sale. The agreement is signed, the price is written into it, and registration is three months away pending a society no-objection and the buyer’s bank clearance. From the moment that agreement exists, what the flat is worth to the buyer is the agreed price, less whatever chance there is that the NOC never comes. A leaking tap in the kitchen no longer changes the number. The paperwork does.
A fixed exchange ratio is that agreement. From the day it is fixed, one share of the target is a claim on a stated number of acquirer shares, deliverable later, if the approvals arrive. The target’s own business has stopped being the thing the price is about.
What a fixed ratio actually does to the series
A merger between listed Indian companies is normally effected through a scheme of arrangement: a document approved by both boards, put to shareholders and creditors, routed through the stock exchanges and the securities regulator, and finally sanctioned by the tribunal. Inside it sits the share swap ratio — the number of acquirer shares each target shareholder will receive. That ratio is fixed in the scheme. It does not move when either share price moves. Everything on the target’s chart from that day onward follows from that one fact.
- Implied value
- What one target share is a claim on, assuming the scheme completes and the shares are delivered on the record date
- Merger spread
- Implied value minus the target’s actual market price. What the market is charging for the wait and for the chance the scheme fails
Example: The spread is not a mispricing to be traded on sight. It is a price for time and for a set of approvals whose outcome you cannot observe, and it widens sharply on any hint that one of them will not arrive.
| What you would normally read | What it means after the ratio is fixed |
|---|---|
| Trend and momentum | The acquirer’s trend, scaled. A momentum screen will rank the target on somebody else’s momentum, which is why merger targets keep appearing in ranking systems that have no idea why |
| Volatility — ATR, band width, any risk sizing | Collapses, usually sharply. The target’s own uncertainty has been replaced by a fixed ratio and a fairly narrow spread. A stop sized on the old range is far too wide; one sized on the new range is far too tight for the day the deal news changes |
| Support and resistance | Historical levels belong to a standalone business that is being wound into another. The only levels that mean anything now are the implied value and, if the scheme fails, roughly where the price was before it was announced |
| Relative strength against its sector | Meaningless. The target is no longer competing with its sector; it is tracking one company in possibly a different one |
| Volume | Changes character. A part of the turnover is now spread traders and index funds adjusting, not opinion about the business |
| A gap on the chart | Very often a deal event — an approval, an objection, a regulator’s query — rather than anything about either company’s trading |
The two ways the series ends
- Approvals land in sequence and the spread narrows towards zero as the record date approaches
- The exchange announces a last trading day and the security is suspended ahead of the record date
- Target shares are extinguished and acquirer shares are credited in the ratio, with a fraction handled by the mechanism the scheme sets out
- The chart simply stops. There is no final decline and no top — the series ends because the instrument does
- Anyone holding through it now owns the acquirer, whose chart they have never looked at
- An approval is refused, a party walks away, or a condition is not met
- The price snaps back towards where the standalone business was valued, in one move, usually on a gap
- The spread you were being paid was the price of exactly this outcome
- Volatility returns to the old level overnight, and the old chart becomes relevant again
- This is the single largest one-day risk in holding a target, and no chart pattern precedes it
Two carve-outs decide whether any of that happens at all, and both are common enough that the flattened chart is the exception rather than the rule.
- An open offer is for a stated proportion of the shares, not for all of them. If more are tendered than the offer is for, acceptance is scaled down and the balance comes back to you to sell in the market. The offer price is a reference point for part of your holding; it is not a floor under the whole of it, and treating it as one is how people end up surprised twice.
- The price the regulations produce is frequently below where the stock is already trading, because it is computed from the acquirer’s own dealings and from past prices rather than from today’s. When that happens almost nobody tenders, nothing pins, and the range never flattens. Read the offer price off the letter of offer and compare it with the screen before attributing anything on the chart to the offer.
A scheme fixes three acquirer shares for every eight target shares. The acquirer trades at ₹800 and the target at ₹282. The acquirer then falls 10% on its own results. What happens on the target’s chart, and why?
Flat ka sauda ho gaya — agreement sign, keemat likhi hui, bas society ka NOC aur bank ki clearance baaki. Us din ke baad kitchen mein tapakta nal daam nahi badalta; kagaz badalta hai. Merger announce hone ke baad target ka chart bhi wahi flat hai — ratio fix ho gaya, ab uska bhaav acquirer ka bhaav guna ratio hai, minus thodi si "kahin sauda toot na jaaye" waali chhoot. Acquirer 10% gira, target bhi 10% girega, aur is company ke baare mein ek khabar tak nahi aayi hogi. Aapka system usme signal dekhta rahega — woh signal kisi aur ka hai.
- Once a swap ratio is fixed, the target’s price is the acquirer’s price scaled by the ratio, less a merger spread.
- The spread is payment for time and for the chance the scheme fails; it narrows as approvals land and gaps out when one is in doubt.
- Volatility, relative strength and every historical level on the target’s chart stop describing the target.
- A cash open offer priced above the market flattens the range almost completely, which makes volatility indicators read as information when they are not; one priced below the market does nothing at all.
- The series does not end in a top — the exchange announces a last trading day and the instrument is extinguished.
Mark it done to track your progress through the curriculum.
Common questions
Short, direct answers to what people ask about this topic.
- share swap ratio meaning
- A share swap ratio is the fixed number of acquirer shares each target shareholder will receive for the shares they already hold — three acquirer shares for every eight target shares, for example. It is written into the scheme of arrangement and does not move when either share price moves, which is exactly why the target’s chart stops describing the target from the day the ratio is fixed.
- the gap between a merger target’s implied value and its market price is called the
- The merger spread. It is what the market is charging for the wait until the record date and for the chance the scheme never completes, so it narrows as approvals land and gaps wider the moment one of them looks doubtful. It is a price for time and legal risk, not a mispricing sitting there to be collected.
- how to calculate the implied value of a merger target share
- Multiply the acquirer’s market price by the exchange ratio. At three acquirer shares for every eight target shares and an acquirer price of ₹800, one target share is a claim on 800 × 3 ÷ 8 = ₹300. The target itself will usually trade somewhat below that figure, and the difference is the merger spread.
- what happens to my shares on the record date of a share swap merger
- The target shares are extinguished and acquirer shares are credited to your demat account in the ratio the scheme fixed, with fractional entitlements handled by whatever mechanism the scheme sets out. The exchange publishes a circular naming the last trading day before the security is suspended ahead of that date, so the chart ends because the instrument ends — there is no top and no final decline.
- why does a merger target stop moving with its own sector
- Because once the exchange ratio is fixed, the price has only two inputs and neither is the target’s own business: the acquirer’s share price, and the market’s estimate of whether the scheme completes. Relative strength against the old sector stops meaning anything, and a momentum screen that ranks the target highly is really ranking the acquirer.