Tight regulatory thresholds on interest rate risk are forcing banks into constrained balance sheet positions, raising concerns that compliance may come at the expense of long-term stability and effective risk management.
Banks must rethink how they interpret
and apply interest rate risk rules or risk destabilizing their own balance
sheets, according to a senior ALM leader who warned that regulatory constraints
are pushing institutions into increasingly narrow and potentially dangerous
positions.
“What we need is a more creative
reading of the rules,” said the Head of ALM Risk at a major European bank,
arguing that strict adherence to current frameworks risks unintended
consequences for both profitability and stability.
Speaking from the perspective of a
practitioner responsible for implementing regulatory requirements, the senior
executive told CeFPro’s most recent Treasury & ALM Risk Europe conference
event how the evolving framework for interest rate risk in the banking book is
reshaping balance sheet management across Europe.
At the core of the issue is a
structural tension between two key metrics - net interest income and the
economic value of equity.
Banks must position themselves within
a constrained space defined by both measures, yet the relationship between them
is inherently negative. Improving one typically worsens the other.
“The freedom is simply restricted,”
he said, explaining that banks cannot freely optimize their position without
accepting trade-offs.
Regulators have formalized this
constraint through supervisory thresholds, with a 15 percent limit for economic
value of equity and a much tighter five percent threshold for net interest
income.
While the latter was raised from an
initially proposed 2.5 percent, the speaker argued it remains
disproportionately restrictive.
“This is just a small fraction of
total net interest income,” he noted, questioning the rationale behind such a
low tolerance level.
The implications are far from
theoretical. In practice, banks are being forced to adjust their balance sheets
in ways that may increase longer-term risk.
To reduce sensitivity to falling
interest rates, institutions often lengthen asset duration by purchasing
fixed-rate instruments. While this improves net interest income stability in
the short term, it simultaneously increases exposure to rising rates through
valuation losses.
The senior executive warned that this
dynamic can create a feedback loop. As rates fall, banks add more fixed-rate
assets to stay within regulatory thresholds.
But when rates reverse, those same
positions generate losses in both equity and earnings, potentially triggering
broader market concerns.
“We seriously fear it,” he said,
referencing scenarios where interest rate positioning could lead to outcomes
similar to past banking stress events.
The challenge is further compounded
by structural features of certain banking systems.
In markets characterized by excess
liquidity and low deposit remuneration, liabilities effectively behave as
fixed-rate instruments during downward rate scenarios. This limits banks’
ability to offset declining asset yields, amplifying net interest income
sensitivity.
In such environments, traditional
asset-liability matching strategies break down. “The picture is much more
complicated,” the speaker explained, noting that standard assumptions about
repricing no longer hold.
