Is it really inevitable for stock prices to fall on ex-dividend days? The wise way to choose the timing for buying stocks.

Stock dividends are a way for many stable companies to give back to their shareholders, and they have become a target pursued by many investors. Even the “Oracle of Omaha” Warren Buffett has placed more than half of his assets in high-dividend stocks, highlighting their appeal. However, for newbies, there are often two questions: Will the stock price definitely fall on the ex-dividend date? Should one buy before or after the ex-dividend date?

The stock price falling on the ex-dividend date is not a hard rule

Theoretically, the stock price on the ex-dividend date should fall, as the company's assets have indeed decreased. Suppose a company is valued at $35 per share, which includes $5 in cash reserves. If it decides to distribute a dividend of $4 per share, then the stock price should reasonably drop from $35 to $31 after the ex-dividend date.

However, in reality, stock price movements are influenced by various factors and are not solely determined by the dividend distribution. I have personally witnessed many well-known companies rising instead of falling on the ex-dividend date.

Take Coca-Cola as an example; this century-old company with stable dividends saw its stock price rise rather than fall on certain ex-dividend dates in 2023. The situation was even more exaggerated for Apple, whose stock price soared from $182 to $186 on the ex-dividend date of November 10, 2023, and even surged 6.18% on the ex-dividend date in May this year!

What do these abnormal phenomena indicate? Stock price trends are not only affected by ex-dividend but also depend on market sentiment, company performance, and industry prospects. Especially for those industry leaders with outstanding performance and favorable prospects, investors' enthusiasm can offset the theoretical fall caused by ex-dividend.

Is it more cost-effective to buy after the ex-dividend date? It depends on the situation.

This question does not have a one-size-fits-all answer and needs to be considered from several perspectives:

Firstly, it is important to understand the concepts of “ex-dividend” and “dividend adjustment”. The former refers to the stock price quickly returning to the level before the ex-dividend date, indicating that investors are optimistic about the company's prospects; the latter, however, is when the stock price remains sluggish and cannot return to its original level, reflecting market concerns about the company's future performance.

My observation is that when deciding whether to buy after the ex-dividend date, one should consider:

1. Performance of Stock Price Before Ex-Dividend - If the stock price has already skyrocketed to a high point, it is likely that some investors will take profits before the ex-dividend date, which increases the risk of entering at this time.

2. Historical Trends - Statistically, stocks tend to fall rather than rise after the ex-dividend date, so short-term traders should be cautious. However, if the stock price falls to a technical support level and stabilizes, it may actually be a buying opportunity.

3. Company Fundamentals - For quality companies with solid fundamentals, ex-dividend is merely a price adjustment, not a loss of value. In this case, buying after the ex-dividend date and holding long-term is often a wiser choice.

The Hidden Costs of Ex-Dividend Stocks

There are some lesser-known costs associated with participating in ex-dividend trading:

Tax Burden - When buying ex-dividend stocks with a personal taxable account, you may face an awkward situation: the stock price falls, leading to unrealized losses, while you also have to pay taxes on the dividends received. This “double bind” predicament leaves many investors feeling frustrated.

Transaction Costs - Don't overlook fees and transaction taxes. Taking the Taiwan stock market as an example, both buyers and sellers have to pay fees (stock price multiplied by 0.1425% and then multiplied by the broker's discount rate), and when selling, a transaction tax must also be paid (0.3% for regular stocks and 0.1% for ETFs).

If you don't want to be troubled by these hidden costs and wish to profit from the fluctuations around the ex-dividend date, you might consider trading Contracts for Difference (CFDs). This method does not require actual stock ownership, so you naturally don’t have to pay dividend tax, and you can flexibly go long or short to take advantage of short-term price fluctuations. However, leveraged tools come with higher risks, and they should be used cautiously based on your own risk tolerance.

Overall, the price movement on the ex-dividend date is a complex market behavior rather than a simple mathematical formula. True investment wisdom lies in comprehensive analysis, combining one's own investment goals and risk preferences to make the most suitable decisions.