Question

but the picture remains murkier for long - term investors, who have received a mostly positive run of data on the markets fundamentals lately with ______ that weaker - than - expected employment readings, inflation, or other pitfalls may yet lie ahead.
source: wall street journal
trepidation
ennui
exhilaration
gusto

Explanation:

The sentence indicates long - term investors are aware that despite positive market fundamentals data, there may be issues like weak employment and inflation ahead. 'Trepidation' means fear or anxiety, which fits the context as investors would be anxious about potential negative events. 'Ennui' is boredom, 'exhilaration' is excitement, and 'gusto' is enthusiasm, none of which match the cautious mood.

Answer:

A. trepidation