Yes, the 1970s and 1980s are probably the two worst decades ever for fashion (except maybe for the invention of the wrap dress), followed by the 1990s. (effortlesslywithroxy.com)
Stuff I'm Reading this Morning... Ending second worst decade for US stocks in history, The Dow has lost 9.2 % over the last 10 years. (thereformedbroker.com)
A portfolio usually smoothes out over 10 years, but one can also have a very bad decade (e.g. 2000 - 2010). (canadiancapitalist.com)