[BRIEFING.COM] The major averages continue to trade lower at midday.
The health care sector (-2.4%) is now the worst-performing S&P 500 sector as all but two of its components trade higher.
Moderna (MRNA 55.16, -2.64, -4.57%) is a laggard, giving back a chunk of yesterday's strength that followed the announcement of a $2.5 billion settlement with Roivant Sciences (ROIV 29.42, -0.10, -0.34%) and Arbutus Biopharma (ABUS 4.74, -0.01, -0.27%).