diff --git a/apps/frontend/src/entities/broker-account/model/brokerAccountsOverview.ts b/apps/frontend/src/entities/broker-account/model/brokerAccountsOverview.ts
index 16a121d..87352b8 100644
--- a/apps/frontend/src/entities/broker-account/model/brokerAccountsOverview.ts
+++ b/apps/frontend/src/entities/broker-account/model/brokerAccountsOverview.ts
@@ -38,6 +38,78 @@ function moneyValue(money: BrokerMoney | null | undefined): number {
   return money?.value ?? 0;
 }
 
+export function formatBrokerMoney(value: BrokerMoney | null | undefined): string {
+  if (!value) {
+    return '—';
+  }
+
+  return formatBrokerCurrencyValue(value.currency, value.value);
+}
+
+export function formatBrokerCurrencyValue(currency: string, value: number): string {
+  return new Intl.NumberFormat('ru-RU', {
+    style: 'currency',
+    currency: currency || 'RUB',
+    maximumFractionDigits: 2,
+  }).format(value);
+}
+
+export function formatBrokerSignedCurrencyValue(currency: string, value: number | null): string {
+  if (value === null) {
+    return '—';
+  }
+
+  const formatted = formatBrokerCurrencyValue(currency, Math.abs(value));
+
+  if (value > 0) {
+    return `+${formatted}`;
+  }
+
+  if (value < 0) {
+    return `−${formatted}`;
+  }
+
+  return formatted;
+}
+
+export function formatBrokerPercent(value: number | null): string {
+  if (value === null) {
+    return '—';
+  }
+
+  return `${new Intl.NumberFormat('ru-RU', { maximumFractionDigits: 2 }).format(value)}%`;
+}
+
+export function formatBrokerSignedPercent(value: number | null): string {
+  if (value === null) {
+    return '—';
+  }
+
+  const formatted = formatBrokerPercent(Math.abs(value));
+
+  if (value > 0) {
+    return `+${formatted}`;
+  }
+
+  if (value < 0) {
+    return `−${formatted}`;
+  }
+
+  return formatted;
+}
+
+export function formatBrokerDate(value: string | null | undefined): string | null {
+  if (!value) {
+    return null;
+  }
+
+  return new Date(value).toLocaleDateString('ru-RU');
+}
+
+export function brokerAccountTypeLabel(type: 'brokerage' | 'iis'): string {
+  return type === 'iis' ? 'ИИС' : 'Брокерский счёт';
+}
+
 export function aggregateBrokerAccounts(portfolios: BrokerPortfolio[]): BrokerAccountsAggregate {
   const portfolioSummaries = new Map<string, MutableCurrencySummary>();
   const cashSummaries = new Map<string, BrokerCurrencyCashSummary>();
diff --git a/apps/frontend/src/pages/broker/brokerAccountsOverview.test.ts b/apps/frontend/src/pages/broker/brokerAccountsOverview.test.ts
deleted file mode 100644
index 5e15834..0000000
--- a/apps/frontend/src/pages/broker/brokerAccountsOverview.test.ts
+++ /dev/null
@@ -1,127 +0,0 @@
-import { describe, expect, it } from 'vitest';
-import type { BrokerPortfolio } from '../../api/responses';
-import { aggregateBrokerAccounts } from './brokerAccountsOverview';
-
-function portfolio(
-  id: string,
-  currency: string,
-  total: number,
-  daily: number | null,
-  cash: number,
-): BrokerPortfolio {
-  return {
-    account: {
-      id,
-      type: 'brokerage',
-      name: id,
-      status: 'ACCOUNT_STATUS_OPEN',
-      openedAt: '2022-06-16T00:00:00.000Z',
-      accessLevel: null,
-    },
-    positionCounts: { shares: 1, bonds: 1, etf: 0, other: 0 },
-    totals: {
-      shares: { currency, units: '0', nano: 0, value: total * 0.5 },
-      bonds: { currency, units: '0', nano: 0, value: total * 0.3 },
-      etf: null,
-      currencies: { currency, units: '0', nano: 0, value: total * 0.2 },
-      futures: null,
-      options: null,
-      structuredProducts: null,
-      dfa: null,
-      portfolio: { currency, units: '0', nano: 0, value: total },
-    },
-    yields: {
-      expectedPercent: 10,
-      daily: daily === null ? null : { currency, units: '0', nano: 0, value: daily },
-      dailyPercent: null,
-    },
-    cash: [{ currency, units: '0', nano: 0, value: cash }],
-    blockedCash: [],
-    asOf: '2026-06-19T10:00:00.000Z',
-  };
-}
-
-describe('aggregateBrokerAccounts', () => {
-  it('sums comparable portfolios and uses the specified daily percent formula', () => {
-    const result = aggregateBrokerAccounts([
-      portfolio('a', 'RUB', 1_100, 100, 200),
-      portfolio('b', 'RUB', 2_200, 200, 300),
-    ]);
-
-    expect(result.portfolios).toEqual([
-      expect.objectContaining({
-        currency: 'RUB',
-        total: 3_300,
-        daily: 300,
-        dailyPercent: 10,
-        allocation: { shares: 1_650, bonds: 990, etf: 0, cash: 660, other: 0 },
-      }),
-    ]);
-    expect(result.cash).toEqual([{ currency: 'RUB', value: 500 }]);
-  });
-
-  it('keeps different currencies separate', () => {
-    const result = aggregateBrokerAccounts([
-      portfolio('rub', 'RUB', 1_100, 100, 200),
-      portfolio('usd', 'USD', 550, 50, 25),
-    ]);
-
-    expect(result.portfolios.map(({ currency, total }) => ({ currency, total }))).toEqual([
-      { currency: 'RUB', total: 1_100 },
-      { currency: 'USD', total: 550 },
-    ]);
-  });
-
-  it('does not expose a daily percent when one account lacks daily data', () => {
-    const result = aggregateBrokerAccounts([
-      portfolio('a', 'RUB', 1_100, 100, 200),
-      portfolio('b', 'RUB', 2_000, null, 300),
-    ]);
-
-    expect(result.portfolios[0]).toMatchObject({ daily: null, dailyPercent: null });
-  });
-
-  it('does not expose a daily percent when start of day is non-positive', () => {
-    const result = aggregateBrokerAccounts([portfolio('a', 'RUB', 100, 100, 20)]);
-
-    expect(result.portfolios[0]).toMatchObject({ daily: 100, dailyPercent: null });
-  });
-
-  it('clamps negative residual other allocation to zero', () => {
-    const overAllocated = portfolio('a', 'RUB', 1_000, 50, 100);
-    overAllocated.totals.shares!.value = 700;
-    overAllocated.totals.bonds!.value = 400;
-    overAllocated.totals.currencies!.value = 100;
-
-    const result = aggregateBrokerAccounts([overAllocated]);
-
-    expect(result.portfolios[0].allocation).toEqual({
-      shares: 700,
-      bonds: 400,
-      etf: 0,
-      cash: 100,
-      other: 0,
-    });
-  });
-
-  it('returns empty summaries for empty or unsupported portfolios', () => {
-    const missingTotal = portfolio('a', 'RUB', 1_000, 50, 100);
-    missingTotal.totals.portfolio = null;
-
-    expect(aggregateBrokerAccounts([])).toEqual({ portfolios: [], cash: [] });
-    expect(aggregateBrokerAccounts([missingTotal])).toEqual({
-      portfolios: [],
-      cash: [{ currency: 'RUB', value: 100 }],
-    });
-  });
-
-  it('groups cash separately by currency', () => {
-    const mixedCash = portfolio('a', 'RUB', 1_000, 50, 100);
-    mixedCash.cash.push({ currency: 'USD', units: '0', nano: 0, value: 25 });
-
-    expect(aggregateBrokerAccounts([mixedCash]).cash).toEqual([
-      { currency: 'RUB', value: 100 },
-      { currency: 'USD', value: 25 },
-    ]);
-  });
-});