* Russia warns that nuclear war risks should not be underestimated
* Central banks need to aggressively fight inflation, says Man Group’s CEO
* Treasury real yields moving closer to zero after extended run in negative terrain
* The case for a possible return of the bond bull market
* US consumers’ discretionary spending fell in March, consultancy estimates
* Potential for more China lockdowns raises risk for global supply chains
* Twitter accepts Elon Musk’s $44 billion takeover offer
* Dallas Fed Mfg Index continues to indicate softer growth in April
* US economy continued to grow at solid pace in March, Chicago Fed data shows: