The stock price of Amkor Tech is likely to decrease in the short term by the amount of the dividend on the ex-dividend date, as the market adjusts for the payout. This is a common occurrence with stocks on their ex-dividend date. The importance is rated high because dividends are a significant event for shareholders, but not at the maximum because it is a regular quarterly occurrence and the amount is relatively small. The confidence level is high due to the predictable nature of stock price adjustments on ex-dividend dates.