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There are literally hundreds of investment boards where anyone can rant, rave, or post BS. Online bulletin boards (BBs) come in various forms, including newsgroups, usenet, or web-based boards. Some of the larger BBs, like those found on sites such as Raging Bull, Boards on Yahoo! Finance, and Silicon Investor, see thousands of messages posted on an hourly basis.
While there are many valid and useful posts on these boards, a large number of tips turn out to be bogus. Fraudsters most often use a pump and dump scheme on BBs by pretending to reveal inside information about big upcoming announcements, great new products, or lucrative contracts. The opposite can be done too. If fraudsters hold a short position in a company, they will try to spread negative rumors in the hope that investors will panic and push prices down.
Here's the tricky part about BBs: anonymity. You don't know for sure who you're dealing with and how credible they are. People claiming to be unbiased observers who've carefully researched a company may actually be company insiders, large shareholders, or paid promoters. A single person can easily create the illusion of widespread interest in a small, thinly-traded stock by posting a series of messages under various aliases.
In the aftermath of the dotcom bubble, bulletin boards experienced a dramatic drop in traffic. Thankfully, many investors realized they couldn't believe everything they read online. But that's not to say there is no valuable information on BBs. Before Enron went bankrupt, posts were made online that revealed many of the fraudulent practices taking place at the energy giant. Regrettably, at the same time, there were countless posts that were bullish on Enron. It's nearly impossible to sort out the valuable posts from the fake ones.
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