In early March 2016, AT&T and its executives learned that a steeper-than-expected decline in smartphone sales by AT&T wo

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In early March 2016, AT&T and its executives learnedthat a steeper-than-expected decline in smartphone sales byAT&T would cause its revenue for the first quarter of 2016(“1Q16”) to fall short of analysts’ estimates.
Fearful of a revenue miss at the end of thequarter, AT&T’s Chief Financial Officer instructed AT&T’sIR Department to “work[] the analysts who still have equipmentrevenue too high.”
Describe what rule AT&T violated with their actionsbelow and specifically why.