D I Y :
I can motivate everybody to try it out / test it out yourself and see whether it happens at your broker too.
You don't need to actually buy the option, just set a low enough Bid that it normally can't get filled in a foreseeable timeframe, and make it a GTC limit order so that it does not expire at the end of the day.
Then during regular market hours compare what your broker says about the best Bid for that strike with what other sites, like YahooFinance etc., say. Does the best Bid match yours, or is there rather a lower Bid? If it shows a lower Bid, then the fraud is in effect!... Your order has been masked (hidden, not submitted to the orderbook, instead broker or market maker has replaced it with his own... to sell it later to you for a profit for him...)
But of course your Bid has to be the best Bid. This can best be tested with options with small or zero volume...
Of course some systems even allow looking deep in the orderbook, there your order should be locatable as well.
I observed what my broker quoted as well what YahooFinance quoted. They both showed the same lower Bid instead of my higher Bid... and this even a whole week long... until I complained...
I can motivate everybody to try it out / test it out yourself and see whether it happens at your broker too.
You don't need to actually buy the option, just set a low enough Bid that it normally can't get filled in a foreseeable timeframe, and make it a GTC limit order so that it does not expire at the end of the day.
Then during regular market hours compare what your broker says about the best Bid for that strike with what other sites, like YahooFinance etc., say. Does the best Bid match yours, or is there rather a lower Bid? If it shows a lower Bid, then the fraud is in effect!... Your order has been masked (hidden, not submitted to the orderbook, instead broker or market maker has replaced it with his own... to sell it later to you for a profit for him...)
But of course your Bid has to be the best Bid. This can best be tested with options with small or zero volume...
Of course some systems even allow looking deep in the orderbook, there your order should be locatable as well.
I observed what my broker quoted as well what YahooFinance quoted. They both showed the same lower Bid instead of my higher Bid... and this even a whole week long... until I complained...
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