PFM is based on the converse piezoelectric effect, where an applied electric field induces mechanical strain in piezoelectric materials. In PFM, an AC voltage is applied between a conductive atomic ...

This article updates my review of PFM published in June 2023 in light of current holdings and recent performance. Invesco Dividend Achievers ETF (NASDAQ:PFM) was launched on 09/15/2005 and tracks ...