But many companies went ex dividend and this held share prices down.

The stock, which has an annual yield of 5.02 percent, goes ex dividend today.

After this date the stock becomes ex dividend.

The stock goes ex dividend today.

Computer program sales of many blue-chip stocks that have recently gone ex dividend may have also played a part in pushing the market lower.

Note that a gilt that is special ex dividend on the proposed delivery day would not be eligible for delivery.

But last Wednesday, when the stock traded ex dividend, it sold at as low as $45.375 and closed at $46.25.

The shares will probably begin trading ex dividend in Canada on Dec. 16, Mr. Austin said.

Home Shopping Network, trading ex dividend, soared a further 5 3/4, to 38 1/4, on the Amex.

Trading in Occidental's shares typically swells the day before the stock goes ex dividend, but today's volume was unusually high, Mr. Ashley said.

However, the basis will weaken when a share in the index goes ex dividend because the futures price is unaffected, while the spot price falls (Schwarz, 1991).

This is positive and increases up to the next ex dividend date, at which point the dirty price falls by the present value of the amount of the coupon payment.

The Treasury 74 per cent 2012-15 would be delivered on 1 June but becomes ineligible because June 1 falls during the special ex dividend period for that bond.

Increase Belittled Analysts and traders discounted the increase in activity, pointing out that potential takeover candidates and stocks that went ex dividend accounted for a sizable portion of the day's volume.

It is clear from (8.33) that the futures index will rise by 1 per cent on the day the shares go ex dividend, whereas the cash index (which makes no allowances for dividends) will be unchanged.

Note that when a share goes ex dividend this should have no effect on the price of the index future because both S and D will fall by the same amount (the present value of the dividend).

A money manager who has a good profit in a stock and who has owned the stock up to the ex dividend date -which locks in the quarterly payout -may be inclined to sell the stock and look elsewhere.

The only slight modification to the above formulation is that, if a bond is declared ex dividend between 1 April and 30 June, the interest accrued is negative during the ex dividend period.

(Certain gilts can be traded special ex dividend three weeks prior to the normal ex dividend date, which means that they can be bought or sold with or without the next coupon during this period.)

For example, in the UK the average period between the ex dividend date and payment of the dividend is fifty three days, while the dividend is announced a few weeks before the ex dividend date (Yadav and Pope, 1992b).

This is because after the ex dividend date, the bond is traded ex dividend; the seller not the buyer receives the coupon and the buyer has to be compensated in terms of a lower price for holding the bond but not receiving the next coupon payment.

In the case of a European option, the option cannot be exercised before the expiry date, so it is possible for the time value to be negative; for an American option if the time value is ever negative, you exercise it (ignoring special circumstances such as the security going ex dividend): this yields a boundary condition.