Finds maximal cliques (largest by default; size spec and count/All forms)
FindClique[g]
FindClique[g, n]
FindClique[g, {n}]
FindClique[g, {nmin, nmax}]
FindClique[g, nspec, s]
FindClique[{g, v}, …]
FindClique[{v -> w, …}, …]
stocks = First[FindClique[g]]
→ g