TY JOUR TI Analysis and evaluation of financial pyramids on the US stock markets KW financial pyramids KW microcap companies KW insider trading KW pump-and-dump KW behavioral finance KW SEC KW information asymmetry KW SPAC. JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Verzhakovskaya, M.A. AU Korolev, A.A. AU Shubina, A.A. PY 2025 IS 0 PB ITBO University