SPY fell 8 cents 9:54:58 to 9:58 thanks to high frequency trading aka HFT
Government regulators allow this because of :
Their logic where it is ok it that it is produced by private company for private companies whgo are willing to pay. There is a real barrier of entry for many people. All news services have services like this. University of Michigan is part of this as well as some Chicago related future boards.
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NOTE I now post my TRADING ALERTS into my personal FACEBOOK ACCOUNT and TWITTER. Don't worry as I don't post stupid cat videos or what I eat!