set enable_seqscan=off;
CREATE TABLE test_money (
	i money
);
INSERT INTO test_money VALUES ('-2'),('-1'),('0'),('1'),('2'),('3');
CREATE INDEX idx_money ON test_money USING rum (i);
SELECT * FROM test_money WHERE i<'1'::money ORDER BY i;
   i    
--------
 -$2.00
 -$1.00
  $0.00
(3 rows)

SELECT * FROM test_money WHERE i<='1'::money ORDER BY i;
   i    
--------
 -$2.00
 -$1.00
  $0.00
  $1.00
(4 rows)

SELECT * FROM test_money WHERE i='1'::money ORDER BY i;
   i   
-------
 $1.00
(1 row)

SELECT * FROM test_money WHERE i>='1'::money ORDER BY i;
   i   
-------
 $1.00
 $2.00
 $3.00
(3 rows)

SELECT * FROM test_money WHERE i>'1'::money ORDER BY i;
   i   
-------
 $2.00
 $3.00
(2 rows)