"Complete coincidence" means when two events happen simultaneously or in close proximity by pure chance, without any deliberate planning or connection. Full definition
It doesn't really matter what the security is, the point is that the most valuable $ 100 is the $ 100 you put in at the bottom by complete coincidence because you simply bought $ 100 every first of the month. (money.stackexchange.com)
Shifting the - LOD curve by 6 years to the right (Figure 2.2 b) results in almost complete coincidence of the corresponding maxima of the early 1870s, late 1930s, and middle of 1990s (Klyashtorin et al. 1998). (fao.org)
Analogy is not the kind of a dialectical relation that terminates in complete coincidence or identification. (religion-online.org)