The drawbacks of quantitative reasoning
Although quantitative easing is a useful tool for central banks across the globe, it's not always a perfect weapon in the fight against economic stagnation. A few things can go wrong, potentially creating a problem in the local economy that the central bank is trying to stimulate. For example, banks are under no obligation to lend their newfound liquidity to people within their local economy, however you want to define 'local economy.'
Instead of lending money to people within the same regional or national economy to start businesses or make major purchases, the bank might choose to invest overseas. Rather than stimulating the economy, the bank would be sending that newly found cash reserve to another economy entirely, defeating the purpose of quantitative easing.
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