XTBshareholders appear entirely unbothered by one of the largest fines Poland'sfinancial regulator has ever handed to a local brokerage house. A day after theKomisja Nadzoru Finansowego (KNF) disclosed a PLN 20 million ($5.5 million)penalty for MiFID II breaches in XTB's client onboarding process, the stockclimbed another 0.7% today (Tuesday) to test a fresh all-time high of 109.28zlotys, extending a rally that has carried it more than 20% higher since thestart of the year and pushed the company's market value above 12 billionzlotys.Singapore Summit: Meet the largestAPAC brokers you know (and those you still don't!)Thepenalty, disclosed by KNF yesterday (Monday), is the second multi-million-zlotysanction the Polish regulator has imposed on XTB in less than a decade. Itcovers how the broker screened retail clients and defined target groups forContracts for Difference between January 2022 and September 2023, as Finance Magnates reported. KNF saidthe practices caused XTB to operate in a manner it described as unreliable andunprofessional.XTB Says Decision Is NotFinal and Not Immediately EnforceableIn aPolish-language statement sent to local media after the ruling, XTB said theKNF decision relates primarily to its target-group determination process andnew-client onboarding, including the registration form in use from January 2022through September 2023. The company said both the form and the onboardingmechanism have already been revised in line with the regulator's guidelines."The KNF decision is not final. XTB is currentlyanalyzing the content of its justification in detail in order to decide onpossible further legal steps," the broker said in the statement,translated from Polish. XTB added that because the regulator did not attach animmediate enforceability clause to the ruling, the company "will not beobliged to pay any penalty before the decision becomes final."That distinction matters in Poland's administrative system,where broker fines can stay tied up in the courts for years.Previous KNF Case TookNearly a Decade to CloseThe mutedmarket reaction suggests investors remember what happened the last time KNFwent after XTB, a case that ran for close to a decade and never produced thekind of knockout blow some activists had pushed for.Thatearlier saga centered on XTB's use of an asymmetric "deviation"parameter in its instant-execution order model between January 2014 and May2015, which KNF said breached best-execution rules by passing negative slippageto clients while keeping positive moves for the broker. The regulator andPolish prosecutors went public with their findings inNovember 2017,triggering a drop of more than 35% in XTB's share price and forcing a temporarytrading halt on the Warsaw bourse. KNF imposed a PLN 9.9 million ($2.7 million)penalty in September 2018, which XTB contested twice.TheVoivodship Administrative Court in Warsaw dismissed the first appeal, and inearly 2023 Poland's Supreme Administrative Court rejected XTB's cassationappeal, making the 2018 ruling final roughly five years after it wasissued and eight years after the disputed conduct. XTBpublicly conceded the case at that point, saying that although it consideredthe decision unfair, it recognized the verdict and was ending its battle tohave it revoked. XTB shares actually rose after the 2023 court decision, asinvestors had long since priced in the loss.One of KNF's BiggestBroker Penalties as Regulator Sharpens Its TeethAt 20million zlotys, the new penalty ranks among the largest KNF has imposed on adomestic brokerage in recent years. In March 2026, the regulator finedSantander Bank Polska a combined 21.1 million zlotys over eight separatebreaches tied to investment services, which market watchers read as a signWarsaw's supervisor has stiffened its stance toward financial firms operatingin Poland.Retail CFDoversight has also hardened elsewhere in Europe. Spain's CNMV bans CFDadvertising to retail investors, a restriction XTB has already had towork around despiteSpain accounting for roughly 10% of its revenue. The UK's Financial ConductAuthority made ESMA's 2018 leverage caps permanent, Belgium has outlawedleveraged CFDs and rolling spot FX marketed through electronic platforms toretail clients, and Germany's BaFin has restricted certain CFD structures onconsumer-protection grounds.KNF pointedin its announcement to its own annual retail forex studies, which show that between70% and 80% of active clients lose money on CFDs and similar leveragedproducts. Protecting retail investors from improper sales practices, theregulator said, remains its priority.Fine Dwarfed by EarningsExpectations for Record 2026Thefinancial hit from the penalty is modest against XTB's current earningstrajectory. Noble Securities analysts forecast full-year 2026 net profit ofaround 1 billion zlotys for the broker, a level that would be a record, as Finance Magnates reported earlierthis year. BM mBankanalyst Mikolaj Lemanczyk projects first-quarter 2026 net profit alone atroughly 455 million zlotys, with revenue climbing about 64% year-over-year to951.7 million zlotys on heavy trading activity in gold, commodities, andmetals.XTB isscheduled to publish preliminary first-quarter figures later in April. Thebroker, which has tested successive all-time highsover the past two weeks following the rollout of options trading in Germany and Spain, ended2025 with more than 2 million clients globally and added 525,452 new Polishaccounts over the past twelve months, accordingto KDPW data.For now,the market appears to be doing the same math Warsaw brokers have grown used toover the past decade. A single-digit-basis-point hit to expected earnings,years of potential appeals, and a product set that investors view as firing onall cylinders have kept the KNF announcement in the background of whatcontinues to be one of the Warsaw exchange's strongest 2026 performers.This article was written by Damian Chmiel at www.financemagnates.com.