composite index combines:

Countries

Small, mid, and large cap stocks

Asset classes

d$)$ Corporate and treasury bonds

ETFs are a bit like Jut trade like

a$)$ Stocks; bonds

b$)$ Mutual funds; $$tocks

c$)$ Stocks; mutual funds

d$)$ Bonds; stocks

Some studies of market efficiency have uncovered results that do not support EMH, such as the January effect. These discrepancies are known as

a$)$ Anomalies

b$)$ Algorithmic trades

c$)$ High frequency trades

d$)$ Inefficient events