By Ben Aris in Berlin Russian businesses are bracing themselves for a financial crunch that could put many of them out of business. The Central Bank of Russia (CBR) interest rate has reached a crushing 21%, with expectations for a further hike in December, and over the last two years companies have built up significant commercial debt with floating rate interest payments. The CBR has progressively raised rates since the second quarter of 2023 in a bid to control persistent inflation and support the faltering ruble. However, the soaring cost of borrowing is now pushing many companies towards a …