      Some market makers are notorious for walking away from or not honoringthe shares that they are offering. Some are slow to respond to you. Others,like Goldman Sachs (GSCO), Merrill Lynch (MLCO), and Morgan Stanley & Co.(MSCO), are generally good about honoring or rejecting trades quickly.Depending upon the security being traded and the market conditions, somemarket makers are better to deal with than others. Only experience willreveal who these market makers are.