BBCA Buyback During the IDX Composite Selloff: What Is the Effect?

PT Bank Central Asia Tbk resumed repurchases of BBCA shares from October 19 to 21, 2026. The transactions fall under a buyback program approved by shareholders on March 12, 2026, with a maximum program value of IDR5 trillion.

The timing coincided with severe pressure on Indonesian equities. BBCA fell 6.86% to IDR4,820 on October 19, while the IDX Composite closed 3.64% lower at 4,996.61. Foreign investors recorded net selling of approximately IDR2.28 trillion in the regular market that day, according to market data cited by Detik.

A buyback can add demand for a stock, reduce the effective number of shares in circulation, and lift earnings per share if profit remains unchanged. Those mechanisms do not make IDR5 trillion a guaranteed price floor. The program ceiling is different from the amount actually executed, and broad selling pressure can be much larger than the company’s purchases.

Execution data will determine the real impact. BCA’s October 19 announcement did not state how many shares would be purchased during the three-day window, the average price, how much of the authorization had already been used in April and June, or the amount remaining under the program.

The October transactions continue a 12-month program

BCA described the October 19 to 21 transactions as a continuation of buybacks carried out in April and June 2026. The authorization runs from March 12, 2026, to March 11, 2027, unless the company ends it earlier.

The official BCA announcement says the program expresses confidence in the company’s fundamentals and is intended to support stability in the Indonesian equity market. BCA also states that the program does not have a material impact on its financial performance or business activities.

The announcement establishes the execution period, but it does not show how many shares were purchased. Authorization gives the company room to transact up to specified limits. The actual effect depends on the number of shares, purchase value, and average price.

BCA resumed the BBCA share buyback from October 19 to 21, 2026, following earlier execution in April and June. Source: PT Bank Central Asia Tbk, October 19, 2026.

IDR5 trillion is not the October transaction value

BCA announced the proposed program on January 28, 2026, and obtained shareholder approval on March 12. The official results of BCA’s 2026 Annual General Meeting approved a maximum buyback amount of IDR5 trillion.

The original program announcement states that the IDR5 trillion ceiling includes brokerage and other costs. It also limits the number of repurchased shares to no more than 10% of paid-in capital.

Neither limit is a spending target. BCA can purchase a smaller amount, select particular execution days, or end the program early. The April and June transactions also used part of the same authorization, so IDR5 trillion is not a fresh amount reserved entirely for October.

BBCA’s buyback program has a ceiling of IDR5 trillion, including brokerage and other costs, over a 12-month authorization period. Source: PT Bank Central Asia Tbk, January 28, 2026. The ceiling is a program limit and does not confirm the value executed in October.

Four channels through which a buyback can affect BBCA

A buyback works through order book demand, management signaling, the effective share count, and the use of corporate cash. The strength of each channel depends on actual execution.

A. Company purchases add demand to the market

When BCA places a buy order, the company becomes one of the buyers of its own shares. The additional demand can absorb part of the sell orders, improve bid depth, or slow a decline when liquidity is available.

The effect depends on scale. A purchase of IDR100 billion may support liquidity, but it may not reverse the price if other investors are selling several trillion rupiah worth of shares.

Execution timing also matters. A one-year authorization gives BCA flexibility, but investors cannot know how purchases are distributed across trading days until execution data is disclosed.

B. A buyback sends a valuation signal

A decision to repurchase shares can indicate that management considers the stock attractive relative to the company’s prospects and capital position. The signal may influence sentiment because the company is willing to allocate funds to its own equity.

The signal does not establish that the stock has reached its lowest price. Management may view BBCA as undervalued while foreign investors continue reducing exposure because of benchmark changes, currency risk, liquidity needs, or global portfolio decisions.

Price action should therefore be tested against volume, foreign flows, and demand after the buyback window closes. A one-session rebound would not be sufficient evidence of a lasting change in trend.

C. Treasury shares can lift earnings per share

Repurchased shares are held as treasury shares while they remain under the company’s control. They reduce the effective share count used in several per-share calculations.

If net profit is unchanged and the effective number of shares falls, earnings per share can rise mathematically. The higher EPS results from a smaller denominator, not from additional operating profit.

BCA reported 123,275,050,000 shares on its shareholding composition page as of December 31, 2025. The same disclosure recorded treasury shares equal to 0.17% of BCA’s stock at the end of 2025, before the 2026 program began.

D. The buyback uses cash and the shares may later return

Funds used for the buyback are no longer available for other purposes while held in treasury stock. BCA must balance the program against capital requirements, loan growth, dividends, technology investment, and liquidity reserves.

OJK Regulation No. 29 of 2023 governs buyback reporting and the eventual transfer of repurchased shares. Treasury stock may later be sold, cancelled through a capital reduction, used in share ownership programs, or transferred through other permitted methods.

The reduction in effective shares is therefore not always permanent. A later resale of treasury shares can increase the available share count and change the per-share effect.

A scale illustration for the IDR5 trillion program

The following calculation uses an assumed price of IDR5,000 per share to make the mechanism easy to reproduce. It is not an estimate of BCA’s actual purchase price or a forecast for BBCA.

If the entire IDR5 trillion ceiling were used at an average price of IDR5,000, the theoretical number of shares purchased would be:

IDR5,000,000,000,000 ÷ IDR5,000 = 1,000,000,000 shares

Compared with the 123,275,050,000 BCA shares reported at the end of 2025, this would equal approximately:

1,000,000,000 ÷ 123,275,050,000 × 100% = 0.81%

If net profit remained unchanged and the full one billion shares reduced the denominator, EPS could rise by roughly 0.82%. The simplified calculation is:

123.275 billion ÷ 122.275 billion = 1.0082

This represents a rough program-level ceiling. Actual execution may be far smaller for four reasons:

• The IDR5 trillion amount includes transaction costs.

• Part of the authorization was used in April and June.

• Actual purchase prices may differ from IDR5,000.

• The company is not required to use the entire ceiling.

Another comparison provides financial context. BCA reported IDR57.5 trillion in net profit for 2025 in its Annual General Meeting results. The IDR5 trillion ceiling equals approximately 8.7% of that figure. This is a scale comparison only and does not indicate that the buyback is funded directly from 2025 profit.

Why the buyback may not reverse the price immediately

Pressure on BBCA in October coincided with concerns about MSCI classification, a sharp IDX Composite decline, and foreign investor selling. Those forces operate across the market, while the buyback is executed by one company within a limited authorization.

BBCA may continue to fall when:

• Investor selling exceeds the company’s purchases.

• Global funds reduce their allocation to Indonesian equities.

• Rupiah weakness and higher bond yields raise the required risk premium.

• Expectations for earnings, net interest margin, or asset quality deteriorate.

• The market doubts that actual execution will approach the announced ceiling.

A buyback may also have a temporary effect if incremental demand disappears after the execution window. A more durable response would normally require support from capital flows, improved market sentiment, and operating performance.

Data to examine after October 21

Investors need execution data to determine whether the buyback had a material effect. The announced schedule alone is insufficient.

Relevant disclosures and indicators include:

• The number of shares actually purchased in October.

• The total value and average purchase price.

• Cumulative execution since April and the remaining IDR5 trillion authorization.

• Changes in BCA’s treasury share balance.

• Daily BBCA transaction value compared with the buyback amount.

• Foreign net buying or selling.

• Loan growth, net interest margin, credit costs, and BCA’s non-performing loan ratio.

These data points can separate short-term price support from a valuation change supported by company performance.

Conclusion

BCA’s buyback adds a source of demand for BBCA while the IDX Composite and banking stocks face heavy selling. The program can also reduce the effective share count and lift EPS mathematically if earnings remain unchanged.

Its impact cannot be measured from the IDR5 trillion headline alone. That amount covers a 12-month program, includes costs, and also covers execution in April and June. The company’s initial October announcement did not state how much would be purchased from October 19 to 21.

Actual buyback data, foreign flows, trading volume, and BCA’s operating performance will determine whether the effect persists after the purchase window closes. A buyback can provide demand support, but it does not guarantee a particular share price.

Disclaimer

This article is for information and educational purposes only. It is not a recommendation to buy, sell, or hold BBCA shares. Stock prices can move sharply, and a buyback does not guarantee a recovery. Readers should review BCA disclosures, IDX market data, OJK regulations, and their own financial circumstances before making investment decisions.