Explanation

High-quality liquid assets (HQLA) are defined by specific characteristics that ensure they can be easily and quickly converted to cash with minimal loss of value during times of stress. Let's analyze each option:

Option A: Active and sizeable market with evidence of market breadth and market depth

• ✅ CORRECT - This is a key characteristic of HQLA. Market breadth (price impact per unit of liquidity) and market depth (units that can be traded for a given price impact) indicate the asset can be sold in large quantities without significantly affecting its price.

Option B: High market concentration among a limited set group of buyers and sellers

• ❌ INCORRECT - This is NOT a characteristic of HQLA. High market concentration actually reduces liquidity because it means the asset depends on a small number of market participants, making it vulnerable if those participants withdraw from the market during stress periods.

Option C: Low correlation with risky assets; i.e., not subject to wrong-way risk

• ✅ CORRECT - HQLA should have low correlation with risky assets to maintain their value during market stress. Wrong-way risk occurs when the value of collateral decreases at the same time the counterparty's credit quality deteriorates.

Option D: Asset class has shown historical tendency to be a "flight to quality" destination

• ✅ CORRECT - Assets that historically serve as safe havens during market turmoil are considered HQLA because they tend to maintain or increase in value during stress periods.

Therefore, Option B is the exception as high market concentration is actually detrimental to liquidity and contradicts the requirements for high-quality liquid assets.