Investors assess how failure of healthcare bill could impact rest of Trump agenda.
Market closed out worst week since election today.
U.S. stocks lose an early gain, falling in late trading.
Apparel maker drags down Dow, which fell 6.71 points to 20,661.30.
Healthy stock market a reason.
Led by declines in banks.
Small-company stocks are falling more than the rest of the market.
Dip in bank stocks has negative impact on market.
Markets show mixed results going into weekend.
Nasdaq finishes flat.