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fool.comAUG 193 min read$IBKR

Interactive Brokers Is Holding $930 Billion of Customer Money. Here's What That Earns at Today's Rates.

Interactive Brokers (IBKR) reported a 40% increase in customer equity to $930 billion last quarter, driven by rising interest rates. The company's net interest income surged from $1.148 billion in 2021 to $3.56 billion in 2025, with a 23% year-over-year increase last quarter. IBKR's stock has risen 500% in five years, but faces risks if interest rates fall. The company is focusing on customer growth, with a 34% year-over-year increase in total customers and a 30% increase in commission revenue.

Original reporting
fool.com
Published Aug 19, 2026, 7:00 AM UTC
Analysis
alphai AI DeskAI-generated
Added to alphai Aug 19, 2026, 7:03 AM UTC. Informational, not investment advice.
How this was made
alphai summarizes source reporting and applies a structured AI analysis for relevance, timing, sentiment and ticker impact. Always verify material claims with the original publisher.
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Interactive Brokers Is Holding $930 Billion of Customer Money. Here's What That Earns at Today's Rates. — source image
Source · fool.com
Decision brief

The 30-second read

$IBKRBullishMed
01

Why it matters

IBKR's sizable cash balances translate into higher net interest income, a key earnings component.

02

Market read

The disclosed earnings drivers highlight rate sensitivity for broker‑dealing stocks.

03

What to watch

Customer growth and commission revenue diversification may offset rate‑risk.

Relevance 8/10Novelty 7/10Timing: recent quarter results

Background

Rising Fed rates since 2022 have increased interest income opportunities for cash‑rich brokerages.

Company-level read

Ticker impact

$IBKRBullishHigh confidence
Context

IBKR disclosed $930 B of customer equity and a 23% YoY rise in net interest income to $1.06 B in the last quarter.

Expected impact

Potential upside for the stock if rates stay high; downside risk if rates decline.

Evidence & confidence

The disclosed growth in interest income is material and directly tied to the firm’s core revenue stream.

Market effects

Sector

Brokerage sector may benefit from higher rates through increased net interest income.

Regional

U.S. brokerage stocks could see relative strength versus low‑rate environments.

Global

Global brokers with large cash balances may experience similar tailwinds.

Counterpoint

What could challenge this read

If rates fall, IBKR's primary earnings driver could reverse, pressuring the stock.

Key entities

  • Company
    Interactive Brokers

    U.S.-listed brokerage (ticker IBKR) with $930 B in customer equity.

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