The Investment Analysis cartridge may never have been released, or it may have been renamed and then released as Securities Analysis. In any case, the cartridge did exist and can be seen in several very early TI brochures announcing the TI-99/4 Home Computer. For example, it is in three places including the front cover of brochure 221006 HS 879, which is the first printed matter TI put out on the 99/4 as far as I know, and it is where they also proudly announce themselves as being "The Official Computer and Calculator Supplier of the 1980 Olympic Winter Games". An advertisement from Factory Direct Sales of Glendale, California, placed in the November 1979 issue of Byte magazine on page 226, also supports the existence of Investment Analysis, since it is listed at $44.95 in their pricing of TI-99/4 cartridges.
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