"From late October until the first week of March, the majority of euro positioning was long the dollar," he said in Monday's note. "But for three weeks now, net positioning is long the euro."
Jordan Rochester, head of FICC strategy and executive director at Mizuho Bank's EMEA arm, told CNBC he held "a down then up view" on the euro against the dollar. He sees the euro falling to somewhere between $1.06 and $1.07 before climbing to $1.12 or higher by the end of the year.
"I expect this market to price in 'maximum pain' once we know the details of the tariffs," he said in an email, arguing that this presented an "opportunity to take the other side."
"Tariffs [are] unlikely to get worse once fully priced in and [the] EU and others [are likely] to respond with ... retaliatory tariffs of their own which will lead to a recovery later on," he said.
Athanasios Vamvakidis, global head and managing director of G10 FX strategy at Bank of America, told CNBC he saw downside ahead for the dollar, despite expecting tariffs to have an immediate positive impact on the greenback.
"For the dollar we have been and we are still bearish for the year as a whole," he said on a call. "We believe the market is already pricing selective tariffs, but it will get tariffs across the board."
He told CNBC that the dollar could rally this week in the immediate aftermath of tariffs coming into effect, but noted that this "most likely will be an opportunity to sell."
"Beyond the very short term, there are two channels that should lead to dollar weakness," Vamvakidis explained. "First, when you have the U.S. against the rest of the world in a trade war scenario, then the U.S. eventually will suffer more because ... when you compare it with the rest of the world, the rest of the world is larger. Second, tariffs suggest stagflationary risks -- and right now, the market is very concerned about such risks."
Like Brusuelas and Rochester, he predicted that the euro would eventually be boosted by Trump's trade war. While the U.S. contends with a policy mix that will likely be negative for its currency, Europe is focusing on "growth friendly policies," Vamvakidis said.
"Germany announcing a massive fiscal stimulus, Europe announcing massive spending on defense, plans for structural reforms to focus on growth and competitiveness," he said. "So far these are plans, but we didn't even [have] such plans before, and coming from Germany, the economy with the weakest growth in the euro zone and the largest economy in the euro zone and the tightest fiscal policy in the euro zone, this is really a game changer."
Vamvakidis said his team sees the euro reaching $1.15 this year and $1.20 in 2026.