Those securities were among the largest holdings of that type in Pimco's $3.6 billion Total Return exchange-traded fund, according to data compiled by Empirasign Strategies LLC and Bloomberg. Banks are also circulating a list of $77 million such bonds for sale today that match the fund's remaining holdings, the data show.

Chart: Non-agency/Alt-A RMBS trading volumes

A US$66.3m 1A slice of a subprime FHLT 2006-B bond, for example, is talked at just 48 cents on the dollar, according to Empirasign data, a market data company.

Trading volumes of auto ABS were normalising this week, after some $1.17bn of paper changed hands the week before last, according to data from Empirasign.

Price talk on the first subprime list offered at 10am runs from a high 90s dollar price for a US$12.1m slice of an ACE 2005-HE7 deal to low-single digits on a US$4.5m mezzanine slice of a CBASS 2006-CB1 bond, according to data from Empirasign, a market data service provider.

Just under €63m of euro CLO paper has appeared in BWICs this week, according to data from Empirasign, which has included small denominations of double-B rated 'Class E' paper from both Alcentra's previous 2014 deals.

Approximately US$135m in risk-sharing bonds was out for bid in each of the past two weeks, the highest levels by far since the programme started in July 2013, according to Adam Murphy, president of market data company Empirasign.

The flow has continued this week with around €450m of BWIC lists that have included some European CLO paper on the market, though only a small fraction of that amount has been CLO bonds, according to data from Empirasign.

Bond investors are backing off the securities as competing investments such as high-yield corporate bonds cheapen. Holders sought bids through dealers on about $80 million of existing rental-home notes in widely marketed auctions Friday, according to data from Empirasign Strategies LLC, which tracks securitization trading.

Bondholders last week sought to sell the most government-backed mortgage derivatives known as interest-only securities and inverse IOs through auctions in four months, according to Empirasign Strategies LLC, which tracks securitization trading.

The average price talk from five dealers was US63.73 cents for the first lot and US57.63 cents for the second, according to Adam Murphy, president of Empirasign, a data service provider.

Next week's batch will likely attract a broader base of buyers than the first, as it includes floating-rate, fixed-rate and adjustable-rate securities, including Option-ARMs - adjustable-rate mortgage bonds - according to Adam Murphy, president of trade database company Empirasign Strategies.

Yesterday's offering was the largest widely marketed auction of non-agency securities sold in a single block since at least 2010, according to Empirasign Strategies LLC, which tracks securitization-market trading. Including sales where bonds could be bought individually or in smaller groups, it was the 10th-largest since then.

The offering was the largest widely marketed auction of non-agency securities sold in a single block since Empirasign Strategies LLC began tracking the data. Including sales where bonds could be bought individually or in smaller groups, it was the 10th-largest since then.

"The question is, how much is Credit Suisse left with after filling client orders?" said Adam Murphy, president of Empirasign Strategies, a capital markets trade database.

Tomorrow's offering is the largest widely marketed auction of non-agency securities being sold in a single block since at least 2010, according to Empirasign Strategies LLC, which tracks securitization-market trading. Including sales where bonds could be bought individually, it would be the 10th largest since then.

"Tomorrow's sale will be the biggest all-or-nothing RMBS list since we began tracking these things back in March 2010," said Adam Murphy, president of Empirasign Strategies, a capital markets trade database.

Empirasign clients can now access Informa's US ABS Commentary and US CMBS Commentary─covering asset-backed securities and commercial mortgage-backed securities, respectively, and both part of Informa's Structured Finance Watch service of news, commentary and deals data─at no additional charge via a tab on its menu bar marked "IGM."

MyData is available for free to existing clients of Empirasign's web platform. Users can upload Microsoft Excel spreadsheets containing lists of the bonds they typically query to Empirasign's website. Empirasign's platform then parses each spreadsheet to turn every row of data into a record, identifying each record by recognizing its CUSIP or ISIN number, and displaying data from vendors and internal sources alongside each identifier.

"We have a lot of experience of taking data from many sources, cleaning it, and giving people a picture of what's going on in the marketplace. We've had an API from the beginning, but not everyone has the time to figure out how to use it," Murphy says. "Almost everyone has some kind of internal database of positions, etc., but the functionality and accessibility of those can be a headache. So, by us doing the 'schlepping' for them, that becomes our headache, and they can see all their holdings and trade history, along with our data on one screen." For example, he says, firms can use Enterprise to spot dealer auctions that yielded favorable trades, then identify similar securities and link that to clients who hold these securities and might be seeking to trade.