Some public companies (mine included) have specific guidelines around how information is disseminated that can be reasonably be expected to impact share prices. If you look at the NASDAQ website (http://www.nasdaqtrader.com/Trader.aspx?id=MarketWatch) they have their own regulations about how it is handled. I'd imagine there are SEC regulations around it as well.
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Some public companies (mine included) have specific guidelines around how information is disseminated that can be reasonably be expected to impact share prices. If you look at the NASDAQ website (http://www.nasdaqtrader.com/Trader.aspx?id=MarketWatch) they have their own regulations about how it is handled. I'd imagine there are SEC regulations around it as well.