Pedestrians walk past street art in Dubai, United Arab Emirates.

Dubai looks like a weak link in the Arab coalition boycotting Qatar. The sheikhdom's real estate and export sectors are particularly exposed to disruptions which could arise from the bitter dispute in the Gulf region. Unlike other parts of the region, the city has much to lose if its investor-friendly credentials suffer.

Trade and financial transactions with its neighbor have been stopped and direct flights grounded since Saudi Arabia began its campaign to isolate the Qatari economy in June. For its part, Qatar has rejected claims it is funding terrorism, and refused to comply with the 13 demands made by Saudi and its close allies. More sanctions may now be imminent.