A deflationary trap is a state of persistent deflation that can spiral downward in the face of zero percent interest, according to Yasushi Iwamoto, professor of economics at the University of Tokyo.

Decline in Prices

During a time of deflation, price levels decline across the economy, according to the Federal Reserve Bank of San Francisco. This can occur when banks limit credit and the availability of money decreases, lowering investment and spending.

Low Interest Rates

In times of recession, low interest rates can drop to zero as the Federal Reserve System tries to stimulate spending. However, these low rates discourage investment and hiring. The Federal Reserve Bank of San Francisco states that if unemployment rises, spending decreases; prices remain low and may even drop lower.

Worsening Deflation

Deflation may become a trap because conventional measures may not solve downward pressures, according to the Federal Reserve Bank of San Francisco. Workers may resist pay cuts, making employers unwilling to create more jobs as consumers resist spending. Banks resist lending if they already suffer from bad loans, which keeps the money supply tight.

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