A Stock Split Multiplies Your Shares. A Reverse Split Does the Opposite, and IDX Companies Do Use It
6 min read
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6 min read
Log into your brokerage account after a reverse stock split and you will see fewer shares than you had the day before, at a proportionally higher price each. Nothing about the value of your holding changed. But the stock you own got there because the price had fallen far enough, or often enough, that the company decided to consolidate its shares rather than let them keep trading at a level exchanges and investors both treat as a warning sign.
This is the opposite move of a regular stock split, and it is a real, regulated corporate action on the Indonesia Stock Exchange, known locally as penggabungan saham. Here is exactly what it does to the shares you hold, why a company chooses it, and two real IDX cases that show it does not fix what was actually wrong with the stock.
A reverse stock split takes a set number of your existing shares and combines them into fewer shares, at a proportionally higher price, without changing the total value of your position. A 10:1 reverse split turns 10 shares into 1, at ten times the price each. A 20:1 reverse split turns 20 shares into 1, at twenty times the price each.
PT Smartfren Telecom Tbk (FREN) ran a 20:1 reverse stock split effective 16 February 2012. Series B shares, trading at Rp50 each before the action, became Rp1,000 shares afterward, with the total number of shares outstanding cut to a twentieth of what it was, reported by Bisnis.com.
| Before reverse split | After reverse split | |
|---|---|---|
| Shares held | 2,000 | 100 |
| Price per share | Rp50 | Rp1,000 |
| Total value | Rp100,000 | Rp100,000 |
The bottom row does not move. That is the entire mechanical effect: fewer shares, each worth proportionally more, same total value, same percentage of the company owned. Market capitalization, the company's total share price multiplied by its total share count, is identical the moment before and the moment after.
A reverse stock split is almost always a response to a share price that has fallen to a level the company, or the exchange, wants to move away from. On IDX, that usually means a stock trading at or near the Rp50 floor price, the lowest price a share is allowed to trade at in the regular market. A stock pinned at Rp50 has no room left to fall on a bad day, which can itself distort trading and make the stock harder to read.
PT Bakrie & Brothers Tbk (BNBR) ran a 10:1 reverse stock split effective 31 May 2018, after its share price had sat at the Rp50 floor for an extended period. The move cut total shares outstanding from roughly 121.16 billion to about 12.12 billion, with the price reset to Rp500, reported by Bakrie & Brothers' own investor relations page. The catch: CNBC Indonesia later reported that BNBR's stock kept falling in the weeks after the reverse split, eventually working its way back down toward the same Rp50 floor the action was meant to move it away from.
A reverse stock split on IDX is not a decision a company can make and announce unilaterally. It falls under Otoritas Jasa Keuangan (OJK) Regulation No. 15/POJK.04/2022 on Stock Split and Share Consolidation by Public Companies, which governs both a regular stock split and its reverse. Under that regulation, a company must first obtain a principle approval from IDX before it can even bring the plan to a shareholder meeting for a vote.
Two timing restrictions sit inside the same rule, cross-corroborated across Kontan and CNBC Indonesia:
When reviewing a reverse split request, IDX weighs criteria that include the stock's trading liquidity, its price and how much it fluctuates, the company's financial performance, the proposed consolidation ratio, how much of the stock is held by the public, and whether the stock is under any trading supervision, per OJK's own published summary of the regulation. None of this makes a reverse split a stamp of approval on the company's fundamentals. It is a procedural check on the mechanics of the corporate action itself.
The share count and price change are mechanical and require no action from you as a shareholder beyond the paperwork your broker handles automatically. What is worth your actual attention is the same question you should already be asking regardless of any corporate action: has anything changed about the business that explains why the price fell that far in the first place.
Before assuming a lower share count and a reset price mean a fresh start, look at the stock's real price history around the split date, not just the headline ratio. NetWort's ticker directory lists every IDX stock the platform tracks alongside its current price, and a stock's own asset page shows full price history so you can see how a company actually traded before and after any corporate action, rather than relying on the ratio alone to tell the story.