So far we have just considered strategies that involve buying options, but bankers are more likely to be writing options. This is a bank’s natural business; they tend to buy options only to hedge existing positions, to reduce exposure, or as part of a more complex trade. The first decision when writing a call is where to pitch the strike. Strikes at new highs and new lows tend to be slightly more expensive but, as few Western people know where the Clouds are, we can use these as well as new highs and lows. Strikes at the top of the Cloud could and should be more expensive, while those within the Cloud can be pitched more cheaply. This is because the market is likely to get stuck inside the Cloud (if it is thick), using up time value. Theta (time decay) is the option seller’s friend. The second decision is when to hedge the call as it moves into-the-money. Let’s consider the example below. Short call strategy Assume we have sold a C$ 1.4000 call on the US dollar (put on the Ca