Markets were a little unnerved yesterday by concern that Germany’s top court may take a long time to rule on complaints lodged against the euro zone’s permanent bailout fund, the ESM, which was supposed to come into effect this week. Finance Minister Schaeuble urged the constitutional court to reach a speedy decision. The judges are not expected to block it but Germany’s president says he won’t sign it into law without the court’s go-ahead. A minor delay will pose no problem. A lengthier one could jolt investors.