51. 虽然纵向基金常被认为是一种创新发展融资机制，不少大型纵向基金却多由传统供资来源供资，而非通过额外的创新发展融资来补充传统的官方发展援助。2015 年，通过纵向基金向联合国发展系统输送的资金额略超 14 亿美元，几乎是2010 年的两倍。与政府捐助方的直接捐款相比，纵向基金分配的资源波动更大，这有可能对发展方面业务活动供资的可预见性产生显著影响，因为纵向基金作为一条资源渠道还将变得更加重要。
51. While vertical funds are often considered a mechanism of innovative development finance, many large vertical funds are financed largely by traditional funding sources rather than through the leveraging of additional innovative development finance to complement traditional ODA. In 2015, resources amounting to a little more than $1.4 billion were channelled to the United Nations development system through vertical funds, nearly double the volume compared with 2010. The distribution of resources from vertical funds tends to fluctuate more significantly than direct contributions from government donors, which could have a notable impact on the level of predictability of funding for operational activities for development as vertical funds continue to become a more prominent channel of resources.