On Sunday, a statement issued by the Frankfurt-based lender called the latest charges "regrettable" and said it "sincerely regrets the impact on the Kospi market of an index arbitrage position unwind involving a small number of Deutsche Bank Group employees".

BBC: Deutsche Bank charged in South Korea over stock rout

It takes forever to build a position or unwind one, but I find the yields--above 10%--sufficiently enticing to dabble therein.

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To unwind a position, you just do the opposite of what you did in the first place.

BBC: Glossary of the credit crunch

It is very important to unwind a position because otherwise you end up having 100 barrels of oil delivered to your desk, which is embarrassing.

BBC: Glossary of the credit crunch

Competing traders in the CDS market could force the bank to pay an even higher premium to unwind its position now that everyone knows how badly JP Morgan wants to cut loose.

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So if you bought 100 barrels of oil to be delivered in November then to unwind the position you have to sell someone 100 barrels of oil to be delivered in November.

BBC: Glossary of the credit crunch