October 1929, stocks crash on sharply falling expectations of nominal GDP growth.
October 2008, stocks crash on sharply falling expectations of nominal GDP growth.

Early 1931, stocks rise on signs of recovery.
Early 2010, stocks rise on signs of recovery.

May 1931, stocks fall as European banking/sovereign debt crisis begins (Kreditanstalt).
May 2010, stocks fall, as European banking/sovereign debt crisis begins.......