Rights Issues and Ex-Rights Reference Price Explained

Complete Analysis of Cash Capital Increases and Ex-Rights Reference Prices

When a listed company announces a cash capital increase, commonly referred to as a “rights issue”, many investors immediately ask one question: how exactly is a rights issue calculated? Because this decision directly affects short-term share-price movements and changes in the value of personal assets, understanding the calculation principles behind it becomes a prerequisite for investors to make reasonable judgements. A cash capital increase may appear to be a highly technical financial arrangement, but every stage involved is closely connected with shareholders’ direct interests. If investors participate or give up the right to subscribe without sufficient understanding, unexpected outcomes may result. This article adopts a prudent analytical perspective and gradually breaks down the key terms involved in cash capital increases, the calculation formula for the ex-rights reference price, the concepts of post-rights discount and post-rights recovery, and the trade-offs involved in subscribing or not subscribing, helping investors establish a clear decision-making basis amid complex market changes.

Before examining the formula in depth, it is necessary to clarify several concepts that are easily confused. Cash capital increase, rights issue, cash dividend and ex-rights reference price may seem related, but their meanings and effects are different. Many investors become unsure when facing company announcements precisely because they confuse these terms. The table below first provides a comparison in order to establish a clear cognitive framework.

Key Terms to Understand before Calculating a Rights Issue

To understand how a rights issue is calculated, the first step is to understand the essence of a cash capital increase. It is not a free bonus share distribution from the company to shareholders, but a financing method in which the company allows existing shareholders to subscribe for newly issued shares at a preferential price in order to raise capital. The use of funds raised by the company can vary. It may be used to expand factories and increase production capacity, invest in research and development to strengthen technological competitiveness, supplement working capital or adjust the financial structure. In other words, shareholders who wish to participate need to contribute additional cash for subscription. This essence determines its fundamental difference from a “bonus issue”: a bonus issue does not require shareholders to contribute capital, whereas the core of a cash capital increase is precisely that shareholders provide funds.

In practice, investors frequently encounter the following key terms. Understanding their meanings is the foundation for all subsequent calculations:

• Subscription price: the discounted price at which shareholders purchase new shares, usually significantly lower than the current market price. The company offers this discount to encourage existing shareholders to subscribe and improve the success rate of the capital increase;

• Allotment ratio: this indicates how many new shares can be subscribed for based on a certain number of existing shares held. For example, if every 1,000 existing shares allow the subscription of 100 new shares, the allotment ratio is 0.1. The higher the allotment ratio, the greater the expansion of share capital and the more obvious the dilution of equity;

• Ex-rights trading date: this is a dividing date. Investors who buy the shares after this date will not be able to participate in the capital increase, and the share price will also begin to adjust accordingly from that day. Therefore, whether an investor holds the shares before the ex-rights trading date directly determines whether they qualify for subscription;

• Subscription payment period: after confirming participation, shareholders need to complete payment within the specified period. Failure to pay within the deadline is usually regarded as giving up the right to subscribe. Investors need to pay attention to this time window in advance to avoid missing the opportunity due to oversight.

It should be noted that a cash capital increase is a relatively common equity refinancing tool. From market practice, many listed companies have used this method during their growth process to raise funds for capacity expansion, technology upgrades or other operational needs. It is itself part of the normal functioning of the capital market and should not be simplistically regarded as positive, nor uniformly interpreted as negative. Therefore, mastering its calculation and judgement methods has practical significance for ordinary investors.

Detailed Explanation of the Ex-Rights Reference Price Formula

The ex-rights reference price is the benchmark price for the opening auction on the ex-rights trading day. Its purpose is to provide a reasonable theoretical reference for the share price after the company’s share capital increases. To understand why it is adjusted downwards, it is necessary to start from the principle of equity dilution.

Because a cash capital increase causes the company to issue new shares, the total number of shares increases. If the company’s overall value does not increase substantially in the short term at the same time, the existing company value must now be spread across more shares. Therefore, in theory, the equity represented by each share is diluted. To reflect this dilution effect, the per-share price is usually adjusted downwards on the ex-rights date. Understanding its calculation method helps investors anticipate the possible range of share-price movement on the ex-rights date and prepare both psychologically and strategically.

The calculation formula for the ex-rights reference price can be expressed as follows:

Ex-rights reference price = (Previous day’s closing price before ex-rights + Subscription price × Allotment ratio) / (1 + Allotment ratio)

The internal logic of this formula is to calculate the weighted average of the market value of existing shares and the cost of newly subscribed shares, then divide it by the total number of shares corresponding to each “unit holding” after the ex-rights adjustment, thereby deriving a theoretical equilibrium price. The numerator represents the total value contained in each “unit holding” after ex-rights, while the denominator represents the number of shares corresponding to each “unit holding” after ex-rights. Dividing the two gives the adjusted theoretical price per share. It should be emphasised that this figure is not a forecast of the future share price, but only provides a reference benchmark for the opening price on the ex-rights date. The actual traded price will still be determined by market supply and demand.

Worked Example

To make this easier to understand, the following example uses a specific scenario. Suppose a company has the following parameters: the closing price on the day before ex-rights is RMB 100, the subscription price for this cash capital increase is RMB 70, and the allotment ratio is 100 new shares for every 1,000 existing shares, or 0.1. Substituting these figures into the formula, the calculation can be carried out step by step:

1. First calculate the numerator: add the closing price on the day before ex-rights to the product of the subscription price and the allotment ratio, namely 100 plus 70 multiplied by 0.1, giving 100 plus 7, which equals 107;

2. Then calculate the denominator: add 1 to the allotment ratio, namely 1 plus 0.1, which equals 1.1;

3. Finally divide: 107 divided by 1.1 is approximately RMB 97.27.

Therefore, the company’s reference price on the ex-rights trading day is approximately RMB 97.27. This means that, compared with the pre-ex-rights closing price of RMB 100, the share price is theoretically adjusted downwards by about RMB 2.73. Understanding this adjustment is important: it helps investors distinguish which share-price movements are caused by the mechanical adjustment of ex-rights and which truly reflect the market’s reassessment of the company’s value. For example, if the share price continues to fall from RMB 97.27 after ex-rights, investors should consider whether this means the market has concerns about the use of the capital raised or the company’s outlook, rather than simply attributing the entire decline to the ex-rights adjustment itself.

Post-Rights Discount and Post-Rights Recovery: Two Directions after Ex-Rights

Ex-rights is only the starting point of share-price adjustment. What truly affects shareholders’ final returns is the subsequent market direction after ex-rights. Around the ex-rights reference price, the share price usually moves in two clearly different directions in later trading days, and investors should understand these two concepts in advance:

• Post-rights recovery: this refers to the share price rising from the ex-rights reference price after ex-rights, gradually making up the price gap caused by the ex-rights adjustment. When the market is optimistic about the company’s outlook and believes that the capital raised will generate substantive returns, a post-rights recovery is more likely to occur. In this situation, shareholders who participate in the subscription may have the opportunity to gain from the price spread;

• Post-rights discount: this refers to the share price failing to rise after ex-rights and instead falling further below the ex-rights reference price, or even below the subscription price. When the market has doubts about the company’s operations or use of funds raised, a post-rights discount is more likely to occur. In this situation, even if the subscription price is lower than the original market price, participants may still face paper losses.

The occurrence of post-rights recovery or post-rights discount is essentially the result of the market repricing the company’s value. These concepts remind investors that the subscription-price discount is only a static price spread. Whether it can be converted into real gains depends on the dynamic trend after ex-rights. Therefore, participating in a capital increase is never the same as guaranteeing a profit, and risk assessment remains indispensable.

How to Decide Whether to Participate in a Cash Capital Increase

After mastering how a rights issue is calculated, the more important step is to assess the actual benefit of participating in the cash capital increase. The share-price adjustment on the ex-rights date is a mechanical technical adjustment and is difficult to avoid in the short term. In the medium to long term, however, whether the share price can recover or even rise ultimately depends on the company’s fundamentals and the efficiency with which it uses the funds raised. Therefore, the decision to participate is not simply a mathematical question, but a comprehensive judgement that needs to combine the company’s business outlook with one’s own funding position. Deciding to participate merely because “the subscription price is cheaper than the market price” is often not sufficiently thorough.

For the two choices of participating and not participating, their respective advantages and disadvantages can be compared as follows:

• The advantage of participating in the subscription is that the subscription price is usually lower than the market price and has a certain price-spread appeal. If investors are optimistic about the company’s growth prospects, participating in the capital increase is equivalent to increasing exposure to an asset they favour at a discounted price, with the opportunity to share in the company’s future development. The disadvantage is that additional cash needs to be invested, tying up part of the investor’s liquidity. If the market performs poorly after ex-rights and a post-rights discount occurs, participants may still face paper losses.

• The advantage of not participating in the subscription is that investors can save funds and retain cash flexibility, while avoiding the dilution risk associated with the capital increase. The disadvantage is that, as the company’s total share capital expands, the investor’s ownership percentage will decline accordingly. If the company subsequently grows well, the investor may also miss out on potential returns as a result.

In making a specific decision, the use of the funds raised by the company is a particularly important judgement dimension. Different uses of funds lead to clear differences in the value of participation:

1. If the funds raised are invested in advanced processes, technology research and development, capacity expansion or other areas that can strengthen the company’s future competitiveness, this indicates that the company is in an active development stage, making its outlook relatively optimistic and increasing the reasonableness of participating in the subscription;

2. If the purpose of the capital increase is more to cover operating losses, repay maturing debt, or if the investor’s own current funding position is tight, the necessity of participation should be assessed more cautiously to avoid taking on risks that do not match one’s own tolerance merely because of a discount.

To make the decision-making process more structured, investors can assess the situation step by step in the following order, rather than relying only on intuition:

1. First, confirm whether you are qualified to participate, namely whether you held the company’s shares before the ex-rights trading date;

2. Second, carefully read the company announcement and clarify the specific use of funds raised in this capital increase;

3. Third, use the ex-rights reference price formula to estimate the theoretical post-ex-rights share price, compare it with the subscription price, and assess the room for price spread;

4. Fourth, combine your own funding position and risk tolerance to judge whether you are willing to commit the corresponding cash;

5. Fifth, if you decide to participate, be sure to pay attention to the subscription payment deadline and avoid losing eligibility because of late payment.

For investors who lack experience, a relatively prudent approach is to first test relevant decision-making strategies through a demo account. After becoming familiar with the ex-rights mechanism and the pattern of share-price movements, investors can then act cautiously through a live account. This helps accumulate experience while reducing the cost of trial and error. It should be especially emphasised that the above content is only intended to explain the calculation and judgement logic of rights issues and does not constitute investment advice. Actual decisions should be made according to one’s own circumstances and after fully assessing the relevant risks.

Returning to a Fundamental Decision-Making Perspective

Overall, the core of understanding how a rights issue is calculated lies in mastering the calculation method for the ex-rights reference price and recognising that a cash capital increase is itself a neutral financial tool. It is neither inherently positive nor inevitably negative; its ultimate impact depends entirely on how the company uses the funds raised. The downward adjustment of the share price on the ex-rights date is only a technical adjustment caused by changes in share capital and does not directly equate to an increase or decrease in shareholder wealth. If investors do not understand this point, they can easily be misled by the superficial price change after ex-rights.

Therefore, when facing a rights issue decision, investors should return to the company’s fundamentals and focus on the purpose of the company’s fundraising and its future development potential, rather than being driven only by short-term share-price movements. A company that uses funds to strengthen its core competitiveness and a company that relies on capital increases to barely maintain operations may have completely different investment values, even if their ex-rights formulas are exactly the same. Only by combining calculation methods with fundamental analysis can investors make relatively prudent judgements that truly align with their own interests in a complex market environment.

Questions Related to Cash Capital Increases