Bursa Malaysia failed to sustain the buying momentum seen most of the day and closed lower on last-minute selling.
At the close, the benchmark FTSE Bursa Malaysia KLCI (FBM KLCI) went down 2.22 points to 1,848.2 from Monday's close of 1,850.42.
Blue chips fell more than 40 points early Monday when the stock market resumed trading after Pakatan Harapan's shocking victory in last Wednesday's defining 14th General Election.
The KLCI fell 40 points at the start but managed to reduce its losses as local funds stepped in to pick up oversold counters due to the knee-jerk reaction.
The ringgit opened easier against the US dollar and other major currencies.
As at 9.00 am, the local unit was quoted at 3.9850/9880 against the greenback from Tuesday's close of 3.9480/9530.