Markets were mixed on Monday.
The S&P 500 fell 0.3 percent while the STOXX Europe 600 rose 0.2 percent.
Asian markets were little changed, with the Nikkei 225 marginally lower and the Shanghai Composite Index up 0.1 percent.
The Bank of Japan is widely expected to add montary stimulus when it meets this week, even though massive monetary and fiscal stimulus have so far failed to spur faster growth as the government struggles with a debt burden that is the world's heaviest and a population that is the world's oldest.
China has also been trying to keep monetary policy loose but may be facing liquidity trap.
Michelle Lam, an analyst at Lombard Street Research, wrote in a note on Monday that "our measure of broad money...has deteriorated on a year-on-year basis, and fell below its level in 2013-14 and the government’s target".