Across the advanced economies, monetary and fiscal policymakers lack the tools needed to respond to another major downturn and financial crisis. Worse, while the world no longer needs to worry about a hawkish US Federal Reserve strangling growth, it now has an even bigger problem on its hands.

What started as a trade war between the United States and China is quickly escalating into a death match for global economic, technological, and military dominance. If the two countries' leaders cannot manage the defining relationship of the twenty-first century responsibly, the entire world will bear the costs of their failure.

After the global risk-off of late 2018, a newfound dovishness on the part of central bankers has combined with other positive developments to revive investors' animal spirits. But with a wide array of financial and political risks clearly in view, one should not assume that the current ebullience will last the year.

Over the past few years, the US Federal Reserve has been ahead of other major central banks in normalizing monetary policy. But now the Fed has abruptly put further interest-rate hikes on hold, owing to key changes in macroeconomic conditions and the political environment.

Since the global synchronized growth of 2017, economic conditions have been gradually weakening and will produce an across-the-board deceleration in the months ahead. Beyond that, the prospect for markets and national economies will depend on a broad range of factors, some of which do not bode well.

Between publicly chastising US Federal Reserve Chair Jerome Powell and escalating his trade war with China, US President Donald Trump has finally rattled the markets. While investors were happy to look the other way during the first half of Trump's term, the dangerous spectacle unfolding in the White House can no longer be ignored.

Leading economic policymakers are now considering whether central banks should issue their own digital currencies, to be made available to everyone, rather than just to licensed commercial banks. The idea deserves serious consideration, as it would replace an inherently crisis-prone banking system and close the door on crypto-scammers.

Now that cryptocurrencies such as Bitcoin have plummeted from last year's absurdly high valuations, the techno-utopian mystique of so-called distributed-ledger technologies should be next. The promise to cure the world's ills through "decentralization" was just a ruse to separate retail investors from their hard-earned real money.

Although the global economy has been undergoing a sustained period of synchronized growth, it will inevitably lose steam as unsustainable fiscal policies in the US start to phase out. Come 2020, the stage will be set for another downturn – and, unlike in 2008, governments will lack the policy tools to manage it.

In a sharp departure from this time last year, the global economy is now being buffeted by growing concerns over US President Donald Trump's trade war, fragile emerging markets, a slowdown in Europe, and other risks. It is safe to say that the period of low volatility and synchronized global growth is behind us.

Financial markets have finally woken up to the fact that Italy could soon be ruled by a populist government with designs to take the country out of the eurozone. And, given Italy's tepid economic performance since adopting the single currency a generation ago, there is little reason to think that the current crisis is a one-off event.

There are now nearly 1,600 cryptocurrencies, and the number continues to rise. It is time to start recognizing their issuers' utopian rhetoric for what it is: self-serving nonsense meant to separate credulous investors from their hard-earned savings.

Even after a sharp correction earlier this year, the price of Bitcoin and other cryptocurrencies has remained unsustainably high, and techno-libertarians have continued to insist that blockchain technologies will revolutionize the way business is done. In fact, blockchain might just be the most over-hyped technology of all time.

Boosters of blockchain technology compare its early days to the early days of the Internet. But whereas the Internet quickly gave rise to email, the World Wide Web, and millions of commercial ventures, blockchain's only application – cryptocurrencies such as Bitcoin – does not even fulfill its stated purpose.

In the first year of his presidency, Donald Trump has consistently sold out the blue-collar, socially conservative whites who brought him to power, while pursuing policies to enrich his fellow plutocrats. Sooner or later, Trump's core supporters will wake up to this fact, so it is worth asking how far he might go to keep them on his side.

US President Donald Trump, in partnership with congressional Republicans, is pursuing tax cuts that will blow up the fiscal deficit and add to the public debt, while benefit the rich at the expense of middle- and working-class Americans. Once again, Trump has not hesitated to betray the people he conned into voting for him.

The International Monetary Fund, which in recent years had characterized global growth as the “new mediocre,” recently upgraded its World Economic Outlook. But is the IMF right to think that the recent growth spurt will continue over the next few years, or is a temporary cyclical upswing about to be subdued by new tail risks?

Since the summer of 2016, the global economy has been in a period of moderate expansion, yet inflation has yet to pick up in the advanced economies. The question that inflation-targeting central banks must confront is straightforward: why?

Now that US President Donald Trump has been in office for six months, the prospects for the US economy and economic policymaking under his administration can be more confidently assessed. And, like Trump’s presidency more generally, paradoxes abound.

Financial markets are starting to get rattled by the winding down of unconventional monetary policies in many advanced economies. But such policies may not be gone for long, because a new recession or financial crisis would force central banks to deploy measures such as quantitative easing and negative interest rates once again.

Recent economic data from around the world suggest that growth could soon accelerate, now that the global economy has weathered multiple crises over the past two years. And yet the possibility of another global slowdown – if not an outright stall – cannot be ruled out.

Even with geopolitical conflicts proliferating around the world, global financial markets have reached new heights. But while there are many explanations for why investors might be underpricing today's risks, there is no good reason for them to ignore the possibility of another "black swan" event on the horizon.

After failing to "repeal and replace" the Affordable Care Act, US President Donald Trump and congressional Republicans are now pursing tax reform, as if this will be any easier. It won’t be, as evidenced by the fact that all of the Republicans’ initial proposals are already dead in the water.

US Republican leaders claim that a border-adjustment tax – which would effectively subsidize US exporters and penalize importers – would improve the US trade balance and boost domestic production, investment, and employment. They are wrong.

Expectations of stimulus, lower taxes, and deregulation might boost the US economy and the stock market’s performance in the short term. But US President Donald Trump's inconsistent, erratic, and destructive policies will take a heavy toll on domestic and global economic growth in the long run.

If the US Federal Reserve becomes too hawkish too soon, it will strengthen the US dollar, undermining Donald Trump’s stated goal of creating jobs and boosting incomes for his blue-collar base. Given his proposed fiscal expansion, Trump would be better off keeping Barack Obama's dovish appointees.

Donald Trump is a businessman who relishes the “art of the deal,” so he is by definition more of a pragmatist than a blinkered ideologue. Once in office, he will throw symbolic red meat to his blue-collar supporters, while reverting to the same supply-side, trickle-down economic policies that Republicans have favored for decades.