A case study.
We are always advising novice traders to use limit orders, and then use the MidPrice between Bid and Ask.
But take a look at the criminal energy of how some bad Market Makers still cheat the traders:
they simply enlarge the Bid/Ask spread by setting either the Bid lower or the Ask higher to move the MidPrice to where they want it to be!...
And: only Market Makers can set the Bid and/or Ask to such arbitrary values, but not the traders!
The consequence is that now the Bid/Ask spread is bigger, and the IV rises to very high values, as well the MidPrice becomes the price the Market Maker wanted to be...
Do you now see how criminal these Market Makers are?
Proof: inspect the Bid/Ask prices for example of the following Put options, especially the Ask prices, b/c some of them are clearly illegal prices, meaning fraudulent prices set by the Market Maker, with Puts especially Ask prices that are greater than the strike are illegal prices! :
And
We are always advising novice traders to use limit orders, and then use the MidPrice between Bid and Ask.
But take a look at the criminal energy of how some bad Market Makers still cheat the traders:
they simply enlarge the Bid/Ask spread by setting either the Bid lower or the Ask higher to move the MidPrice to where they want it to be!...
And: only Market Makers can set the Bid and/or Ask to such arbitrary values, but not the traders!
The consequence is that now the Bid/Ask spread is bigger, and the IV rises to very high values, as well the MidPrice becomes the price the Market Maker wanted to be...
Do you now see how criminal these Market Makers are?

Proof: inspect the Bid/Ask prices for example of the following Put options, especially the Ask prices, b/c some of them are clearly illegal prices, meaning fraudulent prices set by the Market Maker, with Puts especially Ask prices that are greater than the strike are illegal prices! :
And
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