Company A is valued at £2000. 50 percent of the company (1000 shares) are therefore worth £1000 and shares are £1 each. The company issues another 200 shares at £.50 each so each share is worth (£1100/1200) £.91. But the company is still worth £2000 so in time the share prices will return to £1. Or am I wrong and the company has created the 200 new shares out of thin air?
Well we've missed Friday's NYSE open, so this may be too late, but anyway...
Magaluti is right. A rights issue is non-dilutive in that the current shareholders have the right to subscribe for the new shares in proportion to their existing shareholding. If you own 10% of a company, you have the right to subscribe to 10% of the new shares and maintain your 10% shareholding in the company and not get diluted. A convertible bond issue, by comparison, usually issues new shares in the same way(*), but it's the convertible bond holders who have the right to convert into them, diluting the percentage shareholding of the existing shareholders.
However, as barjohn's calculations show, just because something is non-dilutive doesn't mean the share price isn't adjusted. In your example, your calculation is nearly right, but you've added 50% of the capital raised and 100% of the shares issued. The right calculation is:
Company A's market cap is £2000 and there are 2000 shares trading at £1 each.
The company issues 200 shares at a price of £.50 each.
So now:
There are 2000 + 200 = 2200 shares
The new "value" of the company is the old value PLUS the cash they receive from the rights issue.
The adjusted value is therefore £2000 + (200 * £0.50) = 2000 + 100 = £2100
The adjusted share price is the value divided by the shares in issue = £2100 / 2200 = £0.9545
So the company is not "still worth £2000". It's now worth £2100, but there are 2200 shares in issue.
If the perceived value of the company doesn't change, it should now be trading at £0.9545. However, usually the bigger effect on the share price is the reason for the rights issue. If the company's done the rights issue because it's doing something new and exciting, the share may trade higher. Usually it's because the old and boring stuff needs an injection of cash. That bodes badly for the future profitability of the company, so the share will be trading lower. In any event, shareholders usually don't like to be asked to stump up cash to maintain their shareholding, so as a rule shares will trade a bit lower after a rights issue.
In the case of Kinross, it wasn't a rights issue it was a bought deal, so it was dilutive anyway. The calculation is the same, but you don't have to stump up the cash and you don't get the new shares either. They're using the proceeds to repay the credit facilities they used to purchase assets from Barrick Gold and to repay debt maturing in 2016, so they're injecting cash into the old and boring stuff.
Hope this helps,
Claude
(*) A CB issue doesn't have to create new shares. It could be an exchangeable into existing shares.