Macroeconomic conditions that had been working against Zim Integrated Shipping Services (ZIM 0.27%) flipped in the company's favor in January, making investors excited about the opportunity that lies up ahead. Shares of Zim gained 52% in the month, according to data provided by S&P Global Market Intelligence, as investors bet that pricing power was quickly returning to the industry.A geopolitical twist after a tough yearInvestors in the global shipping specialist can't be blamed for feeling a little seasick ...