(Bloomberg) -- The market-making powerhouse Citadel Securities LLC is planning to become a direct buyer of German debt as part of its push to expand across Europe. Most Read from BloombergCalifornia’s Anti-Speeding Bill Can Be a Traffic Safety BreakthroughPipe Fire Near Houston Forces Residents to EvacuateTo Build a Happier City, Design for DensityLondon Mayor Plans to Pedestrianize Busy Oxford StreetNew York City’s Transit System Plans $65.4 Billion of Upgrades for Grand Central, SubwaysThe Ger