LIFFE
Technique
Index finger extended and drawing in air of an S. Click on "How-to" button above for illustration.
Origin
S is first letter of firm name.
Brokerage - Solomon Brothers
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The ability to recognize all market participants was what made open outcry trading transparent and from this, signals were developed for the larger brokerages and for some large local traders. In cases where a more universal signal was never developed, their hand signal in the pit would simply be their three digit firm number