When Group of 20 finance ministers this week urged the Federal Reserve to “minimize negative spillovers” from potential interest-rate increases, they omitted a key figure: $9 trillion. That’s the amount owed in dollars by non-bank borrowers outside the U.S., up 50 percent since the financial crisis, according to the Bank for International Settlements. Should the Fed raise interest rates as anticipated this year for the first time since 2006, higher borrowing costs for companies and governments, along with a stronger greenback, may add risks to an already-weak global recovery. The dollar debt is just one example of how the Fed’s tightening would ripple through the world economy. From the housing markets in Canada and Hong Kong to capital flows into and out of China and Turkey, the question isn’t whether there will be spillovers — it’s how big they will be, and where they will hit the […]