Amazon.com, the world’s largest internet retailer, missed analysts’ fourth- quarter revenue estimates and reported a 57% decline in profit, dragged down by shipping costs and the money-losing Kindle Fire.

AMAZON.COM Inc, the world’s largest internet retailer, reported a plunge in third-quarter profit after it ramped up spending on new products such as the Kindle Fire tablet. The shares tumbled in late trading.

MICROSOFT, the world’s largest software maker, reported first-quarter sales that topped analysts’ predictions as companies invested in Office and server software, outweighing poor demand for computers.

Microsoft Corp, the world’s largest software maker, reported fourth-quarter profit and sales that exceeded analysts’ predictions as demand from corporations outweighed lacklustre buying from consumers.