# Participation Desk · Market

flows by quarter, the collateral split, sellers and buyers.

Live page: https://getbookiq.com/participation-desk/#market

---

PURCHASED, ANNUALIZED
$19.2Bfrom $10.1B at 2016-03
SOLD, ANNUALIZED
$16.3B
OUTSTANDING PURCHASED
$68.2B
ACTIVE BUYERS / SELLERS
747 / 2632.8:1 imbalance
PARTICIPATION NCO (ANN.)
0.56%
CUS WITH ANY ACTIVITY
1,940
FLOW, 2016-03 TO 2026-03 · PURCHASED (AMBER) VS SOLD (BLUE), $B ANNUALIZED
0B
14B
29B
43B
16-03
17-03
18-03
19-03
20-03
21-03
22-03
23-03
24-03
25-03
26-03
COLLATERAL SPLIT OF 2026-03 FLOW, ANNUALIZED
TYPE	BOUGHT $B	SOLD $B
Vehicle	6.73	5.75
1-4 family RE	5.60	5.12
Commercial C&D	3.90	3.31
Commercial excl C&D	0.80	0.44
Student	0.10	0.11
All other	2.09	1.58
WHY THIS MATTERS
Every number on this desk comes from filings each institution makes about itself. No filing names a counterparty, so no participant sees this market whole: a seller cannot see the 747 institutions that bought last quarter, and a buyer cannot see who is about to need liquidity. The call sheets tab turns that asymmetry into two ranked lists. Participation delinquency system-wide runs above the overall loan book, which makes independent surveillance on traded pools the second product this data supports.