Jessica Lerner

The market is still in a negative technical period, said Chris Eustance, a portfolio manager at Morgan Stanley Investment Management.

Muni yields may "continue to stay elevated due to supply and demand factors," rather than concerns over credit quality, said Cooper Howard, a fixed income strategist at Charles Schwab.

Monday saw a reversal from the past week as muni yields rose three to 10 basis points, depending on the curve. Despite this, Monday's losses were not enough to erase last week's gains as yields are still lower than they were two weeks ago.

Investors pulled $1.258 billion from municipal bond mutual funds in the week ending Wednesday, following $3.302 billion of outflows the prior week, according to LSEG Lipper data.

The Investment Company Institute reported larger outflows for the week ending April 9 of $3.714 billion, following $1.15 billion of outflows the previous week.

Citi's exit may have aggravated illiquidity last week, but even the traditional leader in times of stress wouldn't have been able to calm the wild market moves.

If the muni market "stays here at these new relationships, we'll find its footing," said John Flahive, head of fixed income at BNY Wealth.

Friday saw munis sell off once more with yields cut 17 to 28 basis points, pushing muni-UST ratios higher but not quite reaching Wednesday's levels.

Yields rose significantly for the fourth time this week as the aftereffects of President Donald Trump's tariffs continue to plague the financial markets.

"The discussion about policies regarding tariffs will drive performance in bonds over the next three to six months," said Michael Pietronico, CEO of Miller Tabak Asset Management.

Triple-A muni yields plummeted up to 50 basis points Thursday in a dramatic reversal from the week's earlier collapse. Speaking live at The Bond Buyer's Texas Public Finance event, market leaders painted a picture of extreme volatility, impaired liquidity, and an uncertain path forward.

"The equity market is looking at this more positively, but bonds are still thinking, 'Well, these tariffs still have to be resolved,'" said Kim Olsan, a senior fixed income portfolio manager at NewSquare Capital.

Municipal AAA yield curves were cut up to another 42 basis points, depending on the curve, as of noon, pushing yields to multi-year highs and long-end muni to UST ratios above 100%. Muni yields have risen up to nearly 100 basis points in spots since the bond market rout began.

Weakness in the muni market has been partly amplified by ETF selling; high-grade yields rose more than 60 basis points on parts of the curve over two sessions.

"The changing momentum on what the market is looking for on tariffs and the volatility in the equity market is spilling over into the Treasury market, and munis can only fight the Treasury market for so long," said Pat Luby, head of municipal strategy at CreditSights.

"In the aftermath of this week's Treasury yield move lower, MMD-UST ratios have reached short-term highs," Barclays strategists said.

"With the initial announcement proving to be more aggressive than expected, the market responded overwhelmingly negatively," said Principal Asset's Seema Shah.

At noon Thursday, muni yields had been bumped up to 12 basis points, depending on the curve, while UST yields rallied, with yields falling 13 basis points on the short-end.

Parity Plus gives muni issuers increased transparency and resources to determine market demand prior to a bond sale.

Details surrounding the tariffs — which could be anything from reciprocal tariffs to finally implementing delayed tariffs on Canada and Mexico and on pharmaceuticals — have remained unclear, but uncertainty has plagued the market for weeks.