The development lender's latest Global Economic Prospects report showed a 1.5-percentage-point increase from forecasts made in January, before the Biden administration took office and enacted a $1.9 trillion US COVID-19 aid package.
The dollar rose as investors awaited key US readings this week, which are likely to show an economic recovery gathering steam.
Chile's peso fell 0.3%, while Mexico's peso dipped 0.2%. But both currencies are expected to mark strong gains this year, with Chile benefiting from a spike in copper prices, while Mexico is set to benefit from a bounceback in the US economy.
"The year was marked by the outbreak of Covid-19 leading to a sell-off in the financial markets and the dramatic contraction in economic growth around the globe," EMTA said in a statement.
"The adoption of expansive monetary policies and historically low US Treasury yields later encouraged capital flows into higher-yielding asset classes including EM."
Egypt, which was removed from the index in the aftermath of a 2011 uprising, has been working for more than two years to be relisted. It is expected to be included in the second half of 2021.
Egypt has a combined nominal $28.2 billion in eligible bonds that mature in more than 2.5 years, the minimum amount for inclusion in the index, Mandimika said.
The Reserve Bank (SARB) has now kept rates on hold at its last four meetings, resisting pressure to match rate hikes by other emerging market central banks.
South Africa's consumer inflation rate slowed to 2.9% in February, a touch below consensus, its lowest in eight months and below the central bank's target range of between 3% and 6%
Brazil's real rose 0.5% against a stronger dollar. A survey on Monday showed the pace of expansion in the country's manufacturing sector picked up again in February after three months of deceleration.
MXN bonds were the most sensitive during the 2013 & 2016 yields spikes and will likely be hit relatively more as US yields rise.
The lira weakened as far as 7.1840 and stood at 7.17 against the US currency at 1200 GMT, compared to a close of 7.11 on Tuesday.
"Some are sure that he will be appointed energy minister but Erdogan will decide. There are also those in the party that say this is not possible," the official told Reuters.
The peso weakened 1%, with markets also keeping an eye on manufacturing hit by a deep freeze in Texas.
The dimension of the effects at the national level can be significant for the industry, as it comes at a time when the (Mexican) economy is just starting to recover.