Effective Sunday, January 20, 2008 (trade date Monday, January 21, 2008), CME Group will add an additional serial month contract, bringing the total contract listings to three serial and four March quarterly cycle options. Current listing rules state two serial and four March quarterly cycle contracts will be listed for trading. Additionally, the strike price listing rules for E-mini S&P 500 Options will change as detailed in the table below.
|E-mini S&P 500 Options Strike Listing Rules|
|Strike Interval||Current Listing Rules||New Listing Rules|
|5 basis points||At-The-Money ± 25||At-The-Money ± 10%|
|10 basis points||At-The-Money ± 75||At-The-Money ± 20%|
|25 basis points||At-The-Money ± 125||At-The-Money ± 50%|
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