The oft-cited sources include unfair trade practices and big trade deficits. But since these have been in place for decades, they don't explain why trade wars are igniting now.
, a catch-all for all the monetary stimulus programs launched after the Global Financial Meltdown/Crisis of 2008/09.
These include zero interest rate policy (ZIRP), quantitative easing (QE), central bank purchases of government and corporate bonds and stocks and measures to backstop lenders and increase liquidity.
if they want any return on their capital, and brings consumption forward, that is, encourages consumers to borrow and buy now rather than delay purchases until they can be funded with savings.
and over-consumption: with credit almost free to corporations and financiers, new production facilities are brought online in the hopes of earning a profit as the global economy "recovers."
Soon there is more productive capacity than there is demand for the good being produced: this is over-capacity, and it leads to over-production, which as a result of supply and demand, leads to a : producers can't raise prices due to global gluts, so they end up dumping their over-production wherever they can.
If the producers are state-owned enterprises subsidized by governments and central banks, these producers can sell at a loss because their only function is to sustain employment; profitability is a bonus.
Cost-cutting is a never-ending process in a world stuffed with too much capacity: labor costs are slashed by offshoring factories and offices; quality is reduced by buying the cheapest low-quality components and scrimping on quality controls, R&D is trimmed and testing is hurried to get the next product cycle out early enough to maintain a slight competitive advantage.
profits come from either accounting trickery or stock buy-backs that reduce the number of outstanding shares.
These become , kept alive only by super-low interest rates and ample credit.
Meanwhile, consumers have over-borrowed and over-consumed, taking on more debt than would have been possible in the pre-financial repression days.
This is why we read that each new dollar of debt is generating almost no real-world gains, as debt service consumes most of the "new money."
Both imbalances are the result of vast distortions in the incentive structure of the global economy, distortions created by the policies of financial repression: zero interest rates, ample liquidity, financial engineering, government subsidies for over-production, central bank policies keeping zombie corporations alive and so on.
Trade wars are the inevitable consequence of monetary stimulus that creates perverse incentives to borrow more than is prudent, over-produce, over-consume and use accounting trickery and financial engineering to maintain the appearance of fiscal health.