Investors reeled in their expectations for global central bank rate hikes, and bank stocks tumbled once again. In the money markets, a closely watched indicator of credit risk in the U.S. banking system edged up on Monday, as did other indicators of credit risk in the euro zone. The gap between two-year euro swap rates and two-year German bond yields widened by around 20 basis points to 83 basis points, to the highest since Nov. 11. Graphic: Signs of stress - https://www.reuters.com/graphics/MARKETS-SWAPS/gkplwlrmxvb/chart.pngIn Germany, two-year bond yields dropped more than 50 basis points, much more than a drop of 37 basis points on swap rates. Back in late 2008, when failed investment bank Lehman Brothers collapsed, this swap rate went as negative as 300 bps.