Classic movie posters, once regarded as the domain of eccentric collectors, are finally being taken seriously in financial circles because of their often staggering rate of return on investment. In an article for Bloomberg News, it's pointed out that some of the rarer posters appreciate at a far greater pace than many conventional investments. The irony, of course, is that for decades such posters were routinely tossed out after a movie was exhibited. Most had to be returned to National Screen Service, the company that leased the promotional materials to theaters. After a period of years, NSS destroyed older posters, photos and lobby cards, which were never officially available for sale to the public. However, die hard collectors found niche shops that catered to their needs. In the beginning, collectors wanted the posters because of their artistic merit but over the decades, they came to be regarded as a solid financial investment. Click here for more.