Tuesday marked the third straight session of stock losses. Today, it looks like the markets will continue to fall lower for a fourth day in a row. The looming debt ceiling deadline is weighing on investors. A drop in durable goods orders is adding fuel to the bearish fire. As a consequence, a number of stocks are hitting 52-week lows, including online media provider, AOL Inc (NYSE:AOL), and regional bank Popular (NASDAQ:BPOP).

However, on upbeat second-quarter reports some stocks are hitting new 52-week highs, including Amazon.Com (NASDAQ:AMZN), Tempur-Pedic International (NYSE:TPX), and Questcor Pharmaceutical (NASDAQ:QCOR).

A full report on these stocks follows below.

Stocks hitting 52-week highs

Amazon.Com (NASDAQ:AMZN): The online retail website company has gained about 5.5% so far today after posting better-than-expected second-quarter results. Revenue surged 52% from the year-earlier quarter to $9.9 billion. Analysts were expecting $9.4 billion in sales. Earnings also exceeded analysts’ expectations of 35 cents per share, coming in instead at 41 cents.

Tempur-Pedic International (NYSE:TPX): The bedding company best known for its brand name mattresses has woken up to an 11% gain this morning, after reporting strong second-quarter results. Driven by increased demand for its quality mattresses and pillows, revenue increased 30% from the year-ago period to $342.2 million. Earnings jumped to 76 cents per share, from 46 cents in the comparable year-ago quarter.

Questcor Pharmaceutical (NASDAQ:QCOR): The biotech company that provides prescription drugs from the central nervous system and inflammatory disorders has flared up about 20% this morning on better-than-expected second-quarter results. Strong demand for its multiple sclerosis drug, H.P. Acthar Gel, helped boost revenue 62% from the year-ago period, to a record $46 million. Earnings rose to 21 cents, from 14 cents per share in the year-earlier quarter.

Stocks hitting 52-week lows

AOL Inc (NYSE:AOL): The web services and online content provider has slipped about -5% this morning after announcing the launch of AOL HD, an app that will deliver high-definition (HD) video to users connected to certain TV platforms. Investors appear skeptical the app will bring success to AOL’s business line.

Advanced Energy Industry (NASDAQ:AEIS): The manufacturer of industrial power conversion products, like solar panels and semiconductor devices, has dropped about -3% this morning after reporting mixed second-quarter results. Due to oversupply and increasing competition in the market, revenue stayed flat from the previous quarter, despite increasing 38% from the comparable year-ago period, to $138.2 million. Earnings increased to 74 cents from 46 cents in the year-ago period.

Popular (NASDAQ:BPOP): The retail and consumer bank that services clients in Puerto Rico and the U.S. is looking about -1% less popular this morning, despite reporting positive second-quarter results. The publicly owned holding company swung to a profit of 11 cents per share, from a loss of -28 cents in the year-ago quarter. However, investors appear to be selling the stock due to weakness in the overall financial sector, as a result of the looming U.S. debt crisis.

As of this writing, Deborah O’Malley did not own a position in any of the stocks named here.