As Hawk Thorne noted on 7 October 2026, WIG-BANKI's 2.93% rise to 28,338.29 came with the złoty unmoved into the RPP decision, a gap the desk flagged as worth watching once the dust settled. It has now settled the other way. The bank index gave the entire move back and then some, closing at 27,656.2, below its pre-decision level. The one-session reversal suggests the post-decision rally was a relief trade on the hold itself, not a re-rating of the sector's earnings path, which the hold did nothing to change.#

The breadth of the 7 October fall argues against a bank-specific story in isolation. WIG20 fell 1.59%, WIG fell 1.46%, and even the small-cap SWIG80 slipped 0.43%. US indices had already closed lower that day, with a wire report dating the Treasury yield move that drove it to levels not seen since 2002. A global risk-off session pulling every GPW index down together, with banks simply moving by more because they carry more rate sensitivity, is a simpler explanation than a Poland-only repricing.#

If a Polish-specific NBP repricing were driving the bank selloff, EUR/PLN should be the first instrument to move, and it isn't moving.#

This desk has run the test three times now, on 2 October, 6 October and again here. Each time WIG-BANKI has swung by multiples of the broader index, EUR/PLN has stayed close to flat. On 2 October the pair was essentially unchanged across five sessions while the bank index fell 3.64% in a day. Today it's up only 0.23% intraday against a bank-index fall of 2.41%. A genuine shift in the market's view of the reference rate path, still at 3.75% since the March 2026 cut, should show up in the currency that prices Polish rate expectations against the euro. It keeps not showing up there.#

The more consistent reading across all three episodes is that WIG-BANKI's swings track global risk sentiment and valuation adjustments in a sector trading at mid-teens multiples, PKO BP at a P/E of 13.7 and Pekao at 11. That reading survives the 7 October RPP decision cleanly: the hold did not trigger a currency move, and neither did the subsequent bank-index reversal. What it cannot rule out is a slower-moving repricing that the currency is simply late to, or one that shows up first in forward rate expectations rather than spot EUR/PLN. The next test is the NBP's updated projection round. If that round pushes the Council's language toward a longer pause and EUR/PLN still fails to react by more than 0.5% while bank stocks swing on the news, the global-driver reading holds. If EUR/PLN moves by more than 0.5% in step with the next bank-sector swing, the Polish-specific reading this desk retired on 6 October would need reopening.#