Bzzzt - not really. Quartz in BoA, and Athena in JP Morgan (both built by the same folks) essentially takes Python, connects it to a bucketload of C++ and Java

Bzzzt - not really. Quartz in BoA, and Athena in JP Morgan (both built by the same folks) essentially takes Python, connects it to a bucketload of C++ and Java that makes up the bulk of the banks services, adds on a GUI layer, a pretty crappy object storage layer (shudders at Hydra...) and a half-baked object persistence layer that was always so slow. Sure, a lot of Python scripts get written for those platforms, but the heavy lifting -- pricing, trading, order books, risk systems, market data, connectivity all ends up being C++/Java, maybe in a Python overcoat.