Rami: You got me! The TXO specialist has to manually enter a driving price for his option matrix, and this is based on the near-term TXF future, with half an eye on TIPS. The TXF market ebbs and flows with the aggregate bid/ask on the underlying 35, the S&P future, bonds, gold, rumours, crowd psychology, etc. These swings in sentiment can and do provide good opportunities for nimble traders.
It is exactly this liquidity and flux which is most threatened by a screen-based system, where incoming orders can *only* trade against the book, with no possibility of improvement, in my opinion. This is just one of the reasons I am staunchly opposed to the exchange's 'blueprint', which calls for an end of a 'central auction' market.
Porter |