November wasn't half-bad for most investors -- assuming they managed to avoid the duds.

The major U.S. averages posted their second consecutive month of gains in November, albeit barely. The S&P 500 eked out a 0.05% gain for the month, while the Dow Jones Industrial Average managed a 0.3% climb and the Nasdaq gained 1.1%.

The average investor did fairly well, too. According to data from Openfolio, a New York-based social investing company that allows individuals to compare their holdings, seven out of 10 investors made money in November. Among the 15,000 portfolios surveyed, the average gain was 0.6%.

The tech sector drove the biggest wins, with Netflix (NFLX) , Tesla (TSLA) and Amazon (AMZN)  among the biggest wealth-creators for investors in November. But some of the biggest money-makers in the arena -- smaller companies such as Baidu (BIDU) , Box (BOX) and InvenSense (INVN) -- were also among the most overlooked. Industrials and biotechnology stocks made positive contributions as well.

As for the detractors, a number of energy stocks fell sharply, and real estate, financials and telecommunications dragged investors down as well.

Some specific stocks really dinged investors and took a big bite out of their performance. Here are five investments that stung in November.

Twitter

TWTR Chart TWTR data by YCharts

Investors love Twitter (TWTR)  -- but maybe they shouldn't. The social media company is the seventh most popular stock overall among Openfolio users. And in November, it was also one of the biggest destroyers of value, declining about 11%.

At the end of October, Twitter reported third-quarter results, posting earnings of 10 cents per share of $569 million in revenue -- well above the 5 cents on $560 million expected, according to consensus estimates from Thomson Reuters. Weak guidance, however, spooked investors, and in November, sentiments apparently did not improve much.

Among other things, onlookers are wary of Twitter CEO Jack Dorsey's divided attention as the head of not one but two publicly traded companies (he is also chief executive of newly public Square (SQ) ).

TheStreet Ratings team rates Twitter as a sell with a ratings score of D. TheStreet Ratings ream has this to say about its recommendation:

"We rate Twitter (TWTR) a sell. This is driven by multiple weaknesses, which we believe should have a greater impact than any strengths, and could make it more difficult for investors to achieve positive results compared to most of the stocks we cover. Among the areas we feel are negative, one of the most important has been a generally disappointing historical performance in the stock itself."

Highlights from the analysis by TheStreet Ratings team include:

  • Twitter's stock share price has done very poorly compared to where it was a year ago: Despite any rallies, the net result is that it is down by 34.46%, which is also worse that the performance of the S&P 500 Index. Investors have so far failed to pay much attention to the earnings improvements the company has managed to achieve over the last quarter. Naturally, the overall market trend is bound to be a significant factor. However, in one sense, the stock's sharp decline last year is a positive for future investors, making it cheaper (in proportion to its earnings over the past year) than most other stocks in its industry. But due to other concerns, we feel the stock is still not a good buy right now.
  • The company, on the basis of net income growth from the same quarter one year ago, has significantly underperformed compared to the Internet Software & Services industry average, but is greater than that of the S&P 500. The net income increased by 24.9% when compared to the same quarter one year prior, going from -$175.46 million to -$131.69 million.
  • The company's current return on equity greatly increased when compared to its ROE from the same quarter one year prior. This is a signal of significant strength within the corporation. Compared to other companies in the Internet Software & Services industry and the overall market, Twitter's return on equity significantly trails that of both the industry average and the S&P 500.
  • The gross profit margin for Twitter is currently very high, coming in at 78.28%. Regardless of Twitter's high profit margin, it has managed to decrease from the same period last year. Despite the mixed results of the gross profit margin, Twitter's net profit margin of -23.13% significantly underperformed when compared to the industry average.
  • Despite currently having a low debt-to-equity ratio of 0.37, it is higher than that of the industry average, inferring that management of debt levels may need to be evaluated further. Even though the debt-to-equity ratio shows mixed results, the company's quick ratio of 9.41 is very high and demonstrates very strong liquidity.
  • You can view the full analysis from the report here: TWTR


SunEdison

SUNE Chart SUNE data by YCharts

SunEdison (SUNE) was dealt a major blow on the market in November, with its stock price plunging more than 55%. The renewable energy company can't seem to catch a break.

It has spun off two business units -- TerraForm Power (TERP) (for developed markets projects) and TerraForm Global (GLBL) (for emerging markets projects) -- within the past year and a half, and neither has fared especially well on the market. Billionaire David Einhorn of Greenlight Capital, a long-time shareholder, lamented the company's underperformance in his third quarter letter to investors, though he remains long in the stock. (It's worth noting Einhorn isn't having the best year himself.)

Another hedge fund, David Tepper's Appaloosa Management, has recently voiced concerns over management shuffles between SunEdison and spinoff Terraform Power. And a deal between Terraform Power and SunEdison to take control of $3.45 billion in Brazilian assets has been called off.

TheStreet Ratings team rates SunEdison as a sell with a ratings score of D. TheStreet Ratings team has this to say about its recommendation:

"We rate SunEdison (SUNE) a sell. This is driven by some concerns, which we believe should have a greater impact than any strengths, and could make it more difficult for investors to achieve positive results compared to most of the stocks we cover. The company's weaknesses can be seen in multiple areas, such as its generally high debt management risk, generally disappointing historical performance in the stock itself and feeble growth in its earnings per share."

Highlights from the analysis by TheStreet Ratings team include:

  • The debt-to-equity ratio is very high at 8.33 and currently higher than the industry average, implying increased risk associated with the management of debt levels within the company. Along with the unfavorable debt-to-equity ratio, SUNE maintains a poor quick ratio of 0.76, which illustrates the inability to avoid short-term cash problems.
  • Looking at the price performance of SUNE's shares over the past 12 months, there is not much good news to report: the stock is down 85.67%, and it has underformed the S&P 500 Index. In addition, the company's earnings per share are lower today than the year-earlier quarter. Naturally, the overall market trend is bound to be a significant factor. However, in one sense, the stock's sharp decline last year is a positive for future investors, making it cheaper (in proportion to its earnings over the past year) than most other stocks in its industry. But due to other concerns, we feel the stock is still not a good buy right now.
  • SunEdison's earnings per share declined by 19.5% in the most recent quarter compared to the same quarter a year ago. The company has reported a trend of declining earnings per share over the past two years. However, the consensus estimate suggests that this trend should reverse in the coming year. During the past fiscal year, SunEdison reported poor results of -$4.12 versus -$2.39 in the prior year. This year, the market expects an improvement in earnings (-$3.71 versus -$4.12).
  • The company's current return on equity greatly increased when compared to its ROE from the same quarter one year prior. This is a signal of significant strength within the corporation. Compared to other companies in the Semiconductors & Semiconductor Equipment industry and the overall market, SunEdison's return on equity significantly trails that of both the industry average and the S&P 500.
  • The net income growth from the same quarter one year ago has exceeded that of the S&P 500 and the Semiconductors & Semiconductor Equipment industry average. The net income has remained constant at -$284.00 million when compared to the same quarter one year ago.
  • You can view the full analysis from the report here: SUNE


GoPro

GPRO Chart GPRO data by YCharts

"What the hell happened to GoPro?" TheStreet asked recently. And in November, investors were asking the same question. GoPro (GPRO) slid 18% last month, and the scenario may not be looking much brighter anytime soon.

The action-camera maker may be poised for a tough holiday season. Competitors have begun to incorporate its technologies into their own products, leaving GoPro on the sidelines and under mounting pressure to prove it can be more than a one-hit wonder.

The company last reported earnings results at the end of October. It posted earnings of 25 cents per share on revenue of $400 million, falling short of the anticipated 29 cents per share on $434 million, according to Thomson Reuters.

TheStreet Ratings team rates GoPro as a sell with a ratings score of D. TheStreet Ratings team has this to say about its recommendation:

"We rate GoPro (GPRO) a sell. This is driven by some concerns, which we believe should have a greater impact than any strengths, and could make it more difficult for investors to achieve positive results compared to most of the stocks we cover. The company's weaknesses can be seen in multiple areas, such as its generally disappointing historical performance in the stock itself and weak operating cash flow."

Highlights from the analysis by TheStreet Ratings team include:

  • GoPro's stock share price has done very poorly compared to where it was a year ago: Despite any rallies, the net result is that it is down by 73.23%, which is also worse that the performance of the S&P 500 Index. Investors have so far failed to pay much attention to the earnings improvements the company has managed to achieve over the last quarter. Despite the heavy decline in its share price, this stock is still more expensive (when compared to its current earnings) than most other companies in its industry.
  • Net operating cash flow has significantly decreased to $4.62 million or 90.16% when compared to the same quarter last year. In addition, when comparing to the industry average, the firm's growth rate is much lower.
  • The company, on the basis of net income growth from the same quarter one year ago, has significantly underperformed compared to the Household Durables industry average, but is greater than that of the S&P 500. The net income increased by 28.6% when compared to the same quarter one year prior, rising from $14.62 million to $18.80 million.
  • 48.51% is the gross profit margin for GoPro which we consider to be strong. It has increased from the same quarter the previous year. Regardless of the strong results of the gross profit margin, the net profit margin of 4.69% trails the industry average.
  • GoPro has no debt to speak of therefore resulting in a debt-to-equity ratio of zero, which we consider to be a relatively favorable sign. To add to this, GoPro has a quick ratio of 1.83, which demonstrates the ability of the company to cover short-term liquidity needs.
  • You can view the full analysis from the report here: GPRO


Apple

AAPL Chart AAPL data by YCharts

Gasp! Apple (AAPL) did more harm than it did good to investors' portfolios last month.

The beloved tech giant investors dropped 1% last month, meaning headwinds for nearly a third of Openfolio users (it is the platform's most popular stock). Long-time Apple champion Carl Icahn was likely among those losing the most on his investment in the firm.

But Steve Jobs' brainchild shouldn't be written off. Goldman Sachs added Apple to its conviction buy list in late November, listing the stock's return potential at 43%. And on Monday, TheStreet's Jim Cramer noted that the company "has had a really good holiday season" -- even though the season is just getting started.

TheStreet Ratings team rates Apple as a buy with a ratings score of A. TheStreet Ratings team has this to say about its recommendation:

"We rate Apple (AAPL) a buy. This is based on the convergence of positive investment measures, which should help this stock outperform the majority of stocks that we rate. The company's strengths can be seen in multiple areas, such as its impressive record of earnings per share growth, compelling growth in net income, robust revenue growth, notable return on equity and expanding profit margins. Although the company may harbor some minor weaknesses, we feel they are unlikely to have a significant impact on results."

Highlights from the analysis by TheStreet Ratings team include:

  • Apple has improved earnings per share by 38.0% in the most recent quarter compared to the same quarter a year ago. The company has demonstrated a pattern of positive earnings per share growth over the past two years. We feel that this trend should continue. During the past fiscal year, Apple increased its bottom line by earning $9.20 versus $6.43 in the prior year. This year, the market expects an improvement in earnings ($9.88 versus $9.20).
  • The net income growth from the same quarter one year ago has greatly exceeded that of the S&P 500, but is less than that of the Computers & Peripherals industry average. The net income increased by 31.4% when compared to the same quarter one year prior, rising from $8,467.00 million to $11,124.00 million.
  • Despite its growing revenue, the company underperformed as compared with the industry average of 25.2%. Since the same quarter one year prior, revenues rose by 22.3%. Growth in the company's revenue appears to have helped boost the earnings per share.
  • Current return on equity exceeded its ROE from the same quarter one year prior. This is a clear sign of strength within the company. When compared to other companies in the Computers & Peripherals industry and the overall market, Apple's return on equity exceeds that of the industry average and significantly exceeds that of the S&P 500.
  • 45.95% is the gross profit margin for Apple which we consider to be strong. It has increased from the same quarter the previous year. Along with this, the net profit margin of 21.59% is above that of the industry average.
  • You can view the full analysis from the report here: AAPL


National Bank of Greece

NBG Chart NBG data by YCharts

National Bank of Greece (NBG) declined about 80% in November, dealing a major blow to anyone with the stock in their portfolios. In fact, the stock fell so far that the New York Stock Exchange is delisting it.

"NYSE Regulation determined that the Company is no longer suitable for listing based on 'abnormally low' price levels of the Company's American Depositary Shares," the NYSE said in a statement. The stock has fallen from a 52-week high of $2.49 to just 16 cents per share.

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