Wash. Rev. Code § 19.310.080
(1) A person who engages in business as an exchange facilitator shall act as a custodian for all exchange funds, including money, property, other consideration, or instruments received by the exchange facilitator from, or on behalf of, the client, except funds received as the exchange facilitator's compensation. The exchange facilitator shall hold the exchange funds in a manner that provides liquidity and preserves both principal and any earned interest, and if invested, shall invest those exchange funds in investments that meet a prudent investor standard and satisfy investment goals of liquidity and preservation of principal and any earned interest. For purposes of this section, a violation of the prudent investor standard includes, but is not limited to, a transaction in which:
(c) Exchange funds are invested in a manner that does not provide sufficient liquidity to meet the exchange facilitator's contractual obligations to its clients, unless insufficient liquidity occurs as the result of:
(d) Exchange funds are invested in a manner that does not preserve the principal of the exchange funds, unless loss of principal occurs as the result of:
[ 2013 c 228 s 4; 2009 c 70 s 9.]