As I define it, something that is subjective exists within the mind, and something that is objective exists outside of the mind.
I'm wondering what could be described as "subjective information". I think of information as the signals that a brain receives via the sensory receptors and nerves.
Some people might think of a book as being filled with information, but who is it informing, and what information is it providing if it is sitting, closed, on a shelf? A book is an object that exists outside of the mind. If it is read, it doesn't become anything different; it remains a book. I don't think the word, "become" is the best word to use in this kind of question; the words, "stimulate" or "lead to" seem better. A book can become flames, vapors, and ashes if it's burned; it can, perhaps, become cardboard or newspaper if it's recycled, but it can't become a nerve impulse. Light, reflected off a page and into an eye, strikes sensory receptors and stimulates a nerve impulse. A brain interprets that impulse and forms a concept based on that information.
I think all information is objective. I don't think the phrase, "subjective information" makes sense. What one thinks about, as a result of the objective information received, is subjective.
One's thoughts are often the basis for the actions that one chooses and performs (consciously or subconsciously), a frown, for example. Light waves might reflect off of a frown and into an eye, thereby stimulating nerve impulses and subjective interpretations within the mind of the person that is viewing the frown. In a chain of events such as this, I wouldn't say that subjective information became objective information; I'd say that subjective concepts (displeasure in the mind of the frowner) inspired physical acts (the frown), the sensing of which (by sensory cells) stimulated objective information (signals from the optic nerve).