Most people assume a down payment on a home has to come from cash, and that avoiding mortgage insurance requires a large enough cash down payment specifically. A pledged-asset mortgage breaks both assumptions at once, by substituting a security you already own for cash you'd otherwise have to pull out of the market.
What it actually is
A pledged-asset mortgage is a genuine, first-lien mortgage on a property, with one structural addition: instead of, or in combination with, a cash down payment, the borrower pledges a portion of an investment portfolio as supplemental collateral. The securities themselves never leave the borrower's own name or brokerage account. A control agreement between the borrower, the brokerage, and the lender simply restricts the borrower from withdrawing the pledged value until the lender releases the pledge, typically once enough equity has built up in the property or the loan has been paid down sufficiently.
How it avoids mortgage insurance
Private mortgage insurance (PMI) exists specifically to protect a lender when a buyer's cash down payment falls below the conventional loan-to-value threshold that would otherwise limit the lender's risk. A pledged-asset structure gives the lender additional collateral, industry reporting commonly puts this at around 30% of the home's value in typical programs, that exceeds what a conventional cash down payment alone would provide. Because the lender's actual risk position is better covered, many pledged-asset programs waive PMI entirely, and some allow financing up to 100% of the purchase price with no cash down payment at all.
Why pledge assets instead of just paying cash
Two reasons drive most of the actual decisions here. First, opportunity cost: pulling a large sum out of an invested portfolio to fund a down payment means that money stops compounding in the market, a real cost over a multi-decade mortgage term. Second, avoiding a taxable event: if funding a cash down payment would mean selling appreciated securities, that sale realizes a capital gain, exactly the kind of event this site's buy-borrow-die guide describes borrowers structurally avoiding elsewhere in wealth lending. A pledged-asset mortgage applies the same underlying logic, borrow against appreciated assets instead of selling them, specifically to a home purchase.
None of this makes the structure free of risk. The pledged securities are actually tied up: the borrower cannot simply withdraw or sell that pledged portion without the lender's consent, and if the pledged securities lose enough value, the lender can require additional collateral, the same basic mechanism covered on this site's margin-call mechanics guide, just applied to mortgage collateral rather than a standalone credit line.
Three separate features people often conflate
A jumbo mortgage simply exceeds the conforming loan limit set by federal housing regulators; it says nothing about how the down payment is structured. An interest-only mortgage lets a borrower pay only interest for an initial period before principal payments begin; it's a payment-structure feature, unrelated to collateral. A pledged-asset mortgage is specifically about how the down payment and supplemental collateral are structured. These three features are independent of each other: a single loan can be jumbo, interest-only, pledged-asset, all three at once, or none of them, depending entirely on the specific program and the borrower's needs. For a broader look at mortgage rate mechanics generally, see this site's mortgage guide.
What to ask your lender
- What is the specific pledge amount required, as a percentage of the home's value, for this exact program and my exact loan size, not a general industry figure?
- Under what specific conditions does the pledge get released, and how is that release schedule tied to loan paydown or home equity?
- What happens to my required pledge if the pledged securities' value drops significantly before the pledge is released?
- Does this program actually waive PMI, or does it reduce the requirement without eliminating it entirely, and is that stated explicitly in the loan documents?
- If I want to sell or rebalance the pledged securities before the pledge is released, what is the actual process, and does the lender's consent introduce meaningful delay?