Net lease sales volume was up 14.8% year-over-year in Q1, largely pushed forward by massive office deals.

Single-asset office sales hit a historic high in Q1 in terms of sales volume, which jumped 77.9%, and in quantity of transactions, which is up 14.4%, JLL reports. Singaporean capital purchased several large office buildings over the period, which helped drive cross-border capital flows up 83.9% from last year’s level.

Some of those deals include Singapore sovereign wealth fund’s 95% stake in 60 Wall Street for $1B in January, and the same fund’s $1.05B investment in three Washington, DC, office properties through a JV with GIC and Beacon Capital Partners in February.

JLL said private and institutional capital activity remained at normal levels and that office investment in net lease sales totaled $7.2B, while industrial and retail hit $2.5B and $2.4B, respectively. The report also said all cap rates, save retail, have compressed since Q4; retail cap rates have softened 35 basis points year-to-year.