Primary dealers flipped to net short corporate bonds by about 4 billion dollars this year.
This marks the first time they went net short since data started in 1998.
In 2017 the same dealers held peak average long positions of 16 billion dollars.
Now the short sits mostly in longer-dated bonds worth 13.7 billion dollars.
They hold only 9.66 billion dollars long in shorter maturities to offset.
Longer bonds react strongest to any yield rise so dealers show clear caution there.
Credit spreads sit near multi-decade lows which gives almost no extra pay for the risk.
If bonds rally hard the dealers could get forced to cover shorts into a market with very little supply left.
Credit cracks have often hit before stocks turn lower in past cycles.
At the same time Japanese 10-year yields have broken out higher and recently touched 2.90 percent.
That level is the highest since 1996 before a sharp pullback to around 2.71 percent.
Experts warn people underestimate how fast the Bank of Japan will tighten policy.
A parabolic move could push yields from 2.75 percent straight toward 4 percent in the next 45-60 days.
Such a quick rise would defend the weak yen but likely kill the yen carry trade that has fueled global risk assets.
BoJ choices include selling US Treasuries or letting yen slide further toward 180 per dollar.
Either path risks Japan sovereign debt problems plus a wider stock market crisis.
Fed could step in with temporary dollar swap lines like in 2008 and 2020 to manage funding stress.
"I think people are underestimating the pace at which the Bank of Japan 🇯🇵 is going to end up tightening."
Well… the parabolic puts Japan's 10 year yield from 2.75% to 4.0% in the next 45 days, so @AdamPosen could be right.
Rising yields defend currency depreciation, so if… https://t.co/BRvD2Yktnb pic.twitter.com/ecNfYsmmVW
— Financelot (@FinanceLancelot) July 14, 2026
🚨 One of the biggest warning signs in credit markets is flashing
For the first time since 1998, primary dealers have gone net short the corporate bonds they typically hold in inventory, about $4 billion this year.
That means they've sold more credit exposure than they actually… pic.twitter.com/EWt3n74Zoq
— Bull Theory (@BullTheoryio) July 14, 2026