 |  | Payrolls for starter, trade war for main? |  | LONDON (Reuters) - Stocks, gold and most metals headed for a fourth week of gains on Friday, as fresh political woes for U.S. President Donald Trump and the prospect of a trade war with China kept the dollar depressed ahead of U.S. payrolls figures. | |  |  |  | Nothing cold about sub-zero rates, IMF researchers find |  | LONDON (Reuters) - Negative interest rates imposed by central banks have generally worked as a tool to boost inflation, pulling down yields and sometimes weakening currencies, International Monetary Fund research has concluded. | |  | |  |  | |  |  | Related Video | |  | |  | |  |  |  |  |  | Counterparties is a curated snapshot of the best finance news and commentary around the web. Register Today |  | |  |  |  | News you can use with actionable, timely advice for managing your financial life, including retirement, taxes, real estate, education and more. Register Today |  | |  | » » MORE NEWSLETTERS |  | |