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Dividend events4 minute read
Ex-dividend dates and option assignment risk
Learn why short calls can face higher early-assignment risk before an ex-dividend date
Prepared by Mark · Primary sources below
Direct answer
A short American-style call can face higher early-assignment risk before an ex-dividend date when it is in the money and its remaining time value is smaller than the dividend benefit the holder may capture by owning the shares. Assignment is never certain, but the comparison between dividend, time value, and contract terms becomes especially important before the stock begins trading without the dividend
The holder compares exercise with keeping the call
A call holder who exercises receives the stock and may become eligible for the dividend, but gives up any remaining option time value. When the dividend benefit is larger than that time value and financing effects, early exercise can become economically more attractive
The short side cannot schedule assignment
A covered-call seller may be required to deliver shares at the strike if assigned. The position can lose the shares before the record date and therefore may not receive the dividend, even though the call was originally sold against owned stock
Check the full position before the event
Review moneyness, the option's bid and ask, estimated time value, dividend amount, ex-date, and broker deadlines together. Closing or rolling has its own price and fill risk, so placing an order alone does not resolve exposure
Common questions
Are all short calls assigned before a dividend?
No. Assignment depends on holder exercise decisions and contract processing. The dividend and remaining time value only help explain when the probability may be higher
Can a covered call lose the dividend?
Yes. If the call is assigned and the shares are delivered before dividend eligibility is established, the former shareholder may not receive that dividend
Sources and further reading
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