What does this page show? Analyses price behaviour around the ex-dividend date: pre-ex-date drift (dividend capture premium), the price drop on the ex-date and the subsequent recovery. The event window shows the average pattern across all historical dividend dates.

Dividend Effect

Price behaviour around the ex-dividend date

Methodology

Data Source: Price data from the SeasonAlpha database (Supabase, updated daily). Ex-dividend dates and amounts from Yahoo Finance.

t0 = Ex-Dividend Date. On this day the stock already trades without the dividend (ex-dividend). In efficient markets the price drop on the ex-date approximately equals the dividend amount.

Normalization: All historical event windows are normalised to the closing price on the ex-date (t0 = 0%) and averaged. Events with incomplete windows (too close to the start or end of the data) are excluded.

Dividend Capture: The strategy buys shortly before the ex-date and sells afterwards. The pre-ex drift and post-ex recovery determine profitability net of transaction costs.

Understanding the Dividend Calendar — Ex-Dividend Dates, Event Window & Methodology

SeasonAlpha's Dividend Calendar shows the upcoming and historical ex-dividend dates for any ticker, along with the typical price behaviour around that cut-off day. At the top you see the next ex-date with the number of days remaining and the payout amount per share. Below it, an event window analyses the average price path in the trading days before and after the ex-day, averaged across every past dividend date. This is rounded out by a dividend season view (distribution of ex-dates across the twelve calendar months) and a full dividend history table.

How to read the dates: the ex-date (marked as t0 in the chart) is the first day a stock trades without entitlement to the dividend. Anyone buying from that day on no longer receives the current payout. The event window is normalised to the closing price on the ex-day (t0 = 0%), so you can read off the pre-ex drift, the price drop on the ex-day and the subsequent recovery directly. Using the sliders in the sidebar you set the window — for example five trading days before and ten after the ex-date. Metrics such as win rate, average window return and payment frequency summarise the pattern.

On methodology: the ex-dividend dates and amounts come from the dividend_events table of the SeasonAlpha database (source: Yahoo Finance), the price data from the daily-updated Supabase database. The price drop reflects the ex-dividend mechanism: because the company hands out capital with the payout, the exchange reduces the price on the ex-day by roughly the dividend amount — in efficient markets the value with and without the dividend is the same for the investor. SeasonAlpha averages all complete historical event windows (normalised to t0); dates too close to the start or end of the data are excluded so the window always has the same length.

On context and limits: the Dividend Calendar is a descriptive analysis tool, not investment advice and not a forecast of future payouts. Upcoming dates are estimates based on prior payment patterns and can be postponed, cut or cancelled by companies. The dividend capture idea — buy just before the ex-date, sell afterwards — sounds appealing, but the price drop on the ex-day largely neutralises the payout; transaction costs and taxes can erode the effect further. Use the dates and patterns as additional context, not as your sole basis for decisions. Past patterns do not guarantee future results.

Frequently Asked Questions

What is the ex-dividend date? The ex-dividend date (ex-date) is the first trading day on which a stock trades without entitlement to the next dividend. Anyone buying the stock from that day on no longer receives the current payout. That is why the price is reduced on the ex-day by roughly the dividend amount. In the Dividend Calendar, t0 marks exactly this ex-date.

Where do the dividend dates in the calendar come from? The ex-dividend dates and amounts come from the dividend_events table of the SeasonAlpha database (source: Yahoo Finance), the price data from the daily-updated Supabase database. For each ticker, all historical ex-dates are shown, plus the next upcoming ex-date with its remaining time in days and amount per share.

Can you reliably make money with the dividend capture strategy? No. Dividend capture buys shortly before the ex-date and sells afterwards to collect the payout. But because the price falls by roughly the dividend on the ex-day, the effect largely cancels out in efficient markets. Transaction costs and taxes add to this. The Dividend Calendar shows the average historical behaviour descriptively and is not investment advice.