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Is leveraging notoriety to raise stock prices illegal in the US?
There are obviously lots of complexities here, and there are rules against price or market manipulation that are somewhat interpretive due to the rules' inclusion of the manipulator's intent, but: Generally speaking, you can publicly promote the value of a company whose stock you own provided that you: Now, if you extol the value of a company publicly, and sell it immediately thereafter, "pump and dump," the regulators might suggest that your actions imply that you didn't believe it was so wonderful, and were misleading the public to move the price.     That said, a fair retort might be that you loved it for all the reasons you said at [lower price], but thought it had run its course once it got to [higher price].   Again, if it can be demonstrated that your reason for praising it was to push the price higher, your intent may land you in hot water. This isn't legal advice or a full analysis, but if Fitty essentially declared his honest reasons for loving a stock in which he is invested, and discloses that investment, letting others know he is biased, he's probably ok, especially if he intends to hold it long term.