Facebook's numbers for the second quarter were not well received by investors. Within a very short period of time, the largest social network lost almost $120 billion in market value Investopia No US company has ever experienced a similar black day before, as the graphic shows. The reason for this enormous destruction of capital, in addition to stagnating user numbers in the USA and Europe, is a sales warning. Accordingly, Facebook assumes that revenues will no longer increase at the previous pace.