"Appreciation of the U.S. Dollar (mainly against the euro, yen and the ruble), along with the relative slowdown of emerging markets (particularly Russia, Brazil and China), had a double impact on IT spending in 2015, and explains the downward revision in the forecast," Gartner Research Vice President Anurag Gupta said.
Unsurprisingly, most technology firms reporting revenue in US dollars have taken a negative hit on their quarterly revenue earnings, he added.
Given currency exchange rates, Gartner expects all industries to experience negative growth in 2015.
IT spending in the banking and securities segment is forecast to decline 2.4 per cent in 2015 to USD 486.2 billion.
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Gartner expects banks in developed markets to double their IT budgets to support digital and other new technology initiatives through 2019 while reducing legacy maintenance, to sell products, service customers and reduce operational costs.
"Banks will also look to invest in data solutions, driven by availability of big data, analytics tools and competition from fintech companies that rely on big data and analytics more to reach the right customer and analyse the risks," Gartner Research Director Rajesh Kandaswamy said.
IT spending in the retail sector is forecast to decline 1.5 per cent in 2015 to USD 176.91 billion, while that by the healthcare provider industry is expected to fall 2.7 per cent to USD 104.98 billion in 2015.
Globally, the biggest fall is expected to be seen in the government sector at five per cent with an estimated USD 424.66 billion being spent this year.