HSBC Global Asset Management, an arm of HSBC Holdings (HSBA.L), is buying bonds of commodity exporting countries because their valuations have dropped so far with the plunge of oil prices, an executive said. The firm, which managed $454 billion of assets at the end of December, is also increasing its exposure to beaten-down currencies of countries such as Russia and Brazil because of attractive valuations, said Olga Yangol, a vice-president and senior product specialist for emerging markets.