The most shorted stock traded on the Nasdaq held on to its top spot on the list between the June 15 and June 30 as short sellers piled on. This big move came despite the sluggish growth of the economy and despite markets near all-time highs after a more than eight-year bull run.

There also were move big short interest swings at the bottom of the top 10 most shorted Nasdaq stocks as last month came to a close. Those included the largest broadcasting and cable television company in the world by revenue, a leading vaccine maker and an online coupon king.

Note that four Nasdaq stocks had more than 100 million shares short, as of the end of June. However, two of them remained very far ahead of the pack.

Frontier Communications

After rising in the previous three periods, the number of shares short in Frontier Communications Corp. (NASDAQ: FTR) added another 10% or so to more than 327.24 million as of the most recent settlement date. That was well more than 25% of the telecom’s float, and also the first time in more than a year that more than 300 million shares were short. The daily average trading volume increased sharply, so the days to cover fell to almost 11 from less than eight.

Frontier shares were trading at 52-week lows during the period. Short sellers watched the share price drop more than 11%, though it had been up around 6% at one point early in the period. The stock closed most recently at $13.48 a share, after hitting a split-adjusted 52-week low of $13.30 earlier in the day. The split-adjusted 52-week high of $78.30 was seen almost a year ago.

Sirius XM

The almost 247.39 million Sirius XM Holdings Inc. (NASDAQ: SIRI) shares short by the end of June was less than 2% higher than on the previous settlement date. That was still the second lowest number of shares short so far this year, and it represented 16.6% of the total float. As the average daily volume retreated, the days to cover rose from less than nine, a year-to-date low, to more than 10.

Sirius recently said it would take a big stake in Pandora Media. The stock climbed more than 5% in the period, though it has given back much of the gain since then. The Nasdaq was down fractionally by the settlement date. The stock closed on Wednesday at $5.41 a share, near the 52-week high of $5.53 from back in March. The 52-week low of $4.05 was seen last summer.

AMD

By the end of last month, Advanced Micro Devices Inc. (NASDAQ: AMD) had more than 145.10 million shares short. That was a reduction of more than 6% from the total on the previous settlement date, which was the highest level of short interest in at least a year. The most recent reading represented 17.2% of the company’s float. It would take less than two days to cover all short positions.

AMD was seen during the period as a rising threat to Intel. While the June 30 share price was more than 8% higher than on the previous settlement date, the shares had been up about 25% at one point in the interval. The stock closed at $14.29 on Wednesday, about 26% higher year to date. Shares have changed hands between $5.01 and $15.55 in the past year.

Intel

More than 102.34 million Intel Corp. (NASDAQ: INTC) shares were sold short as of the most recent settlement date. Short interest increased only fractionally during the period to total 2.2% of the company’s float. That was the fourth consecutive period with the greatest number of shares short in the past year. As of the latest settlement date, it would take about four days to cover all short positions.

Merrill Lynch stayed bullish on Intel despite the pullback in many big tech stocks last month. Though the shares ended the short interest period more than 4% lower, they have recovered a bit since that time. The most recent close at $34.25 a share compares to a 52-week trading range of $33.23 and $38.45, and it is more than 5% lower than at the beginning of the year.

Opko Health

Opko Health Inc.’s (NASDAQ: OPK) short interest of more than 75.78 million shares on the most recent settlement date was nearly 3% lower than in the previous period, which had  the greatest number shares of short in the past year. The latest figure was 22.7% of the total float. The daily average volume rose between the settlement dates, and the days to cover dropped from more than 19 to less than 16.

For well more than a year, the CEO frequently has bought batches of Opko shares. The stock closed most recently at $6.10 a share, in a 52-week trading range of $5.99 to $12.15. The share price rose about 10% but then gave up most of that gain during the two-week short-interest period. It has pulled back another 6% since then. The stock is now more than 34% lower than at the beginning of the year.

Synergy Pharmaceuticals

Short interest at Synergy Pharmaceuticals Inc. (NASDAQ: SGYP) totaled about 61.71 million shares on June 30, which was up more than 5% from the prior settlement date. That was the third straight period of rising short interest, and it represented a whopping 27.5% of the total float. The days to cover increased from nearly 10 to about 12 during the period.

This biopharmaceutical company is focused on treatments for constipation and irritable bowel syndrome. Short sellers watched the stock rise nearly 16% but then end up down less than 9% during those two weeks. The most recent closing share price was $4.46, which is more than 26% lower than at the beginning of the year. The 52-week trading range is $3.34 to $7.15.

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And Others

Rounding out the top 10 were Novavax Inc. (NASDAQ: NVAX), Comcast Corp. (NASDAQ: CMCSA), Micron Technology Inc. (NASDAQ: MU) and Groupon Inc. (NASDAQ: GRPN). While the others here saw sharp declines in the numbers of their shares short, Groupon had a surge in its short interest in the latter weeks of June.

Short sellers gave up on Apple Inc. (NASDAQ: AAPL) in a big way, allowing it to drop well out of the top 10 most shorted Nasdaq stocks. It now ranks below the likes of Ascena Retail Group Inc. (NASDAQ: ASNA), BlackBerry Ltd. (NASDAQ: BBRY) and Microsoft Corp. (NASDAQ: MSFT).

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