Can US Banks Offset $326.7 Billion in Paper Losses if Rates Keep Rising?

Five of Wall Street's biggest banks lost around $270 billion in market value from their summer highs through Friday's close, as the 10-year US Treasury yield topped 5.35% — its highest since 2002 — and cut the value of bonds the banks already hold.

The mechanism is straightforward. When yields rise, bond prices fall. Banks hold large portfolios of bonds, and the resulting paper losses sit on their balance sheets even though the bonds have not been sold. US lenders carried $326.7 billion in such losses at the end of June, before yields jumped again. That same squeeze helped bring down Silicon Valley Bank in 2023.

The selloff is notable because it runs against the broader market. The S&P 500 is still up roughly 14% this year, even as the five major banks fell from their summer peaks. Investors are asking whether the profit boom that lifted bank shares can hold up as rates stay high or move higher.

Fed meeting minutes released Wednesday showed most officials expect another rate increase before the end of the year, with no specific timing given. The next decisions fall on Oct. 28 and Dec. 9. That leaves open both whether a hike happens and when.

What is not known is how much the $326.7 billion in paper losses has grown since yields rose further. Nor is it clear whether the big banks can offset rate pressure with trading revenue and dealmaking, or whether the unrealized-loss problem is contained rather than systemic. The comparison to SVB is about mechanism, not an assertion that a failure is imminent.

For anyone holding bank stocks, deposits, or rate-sensitive assets, the divergence matters: a rising index does not mean every sector is rising, and higher rates can erode balance sheets even when headline profits look strong.