For a second day in a row the S&P/ASX 200 (Index: ^AXJO) (ASX: XJO) is in negative territory, this time with the health care and consumer staples sectors weighing down the index. In early afternoon trade the index is down 0.4% to 5,336 points.

Four shares which have acted as a drag on the index today are below. Here’s why they have dropped lower:

a2 Milk Company Ltd (Australia) (ASX: A2M) shares have dropped 4% to $1.84 after analysts at Citi downgraded the growing milk company to a sell rating. According to a research note out of the investment bank, its analysts are expecting a tough year ahead for sellers of infant formula into the China market. At the current price, I think a2 Milk is starting to look like a great long-term investment option for investors.

Resolute Mining Limited (ASX: RSG) shares are down 7% to $1.65. Whilst the majority of Australian gold miners are trading lower today due to a pull back in the gold price, Resolute is also in the spotlight after releasing its quarterly production figures. Although gold production fell quarter on quarter from 83,087 ounces to 79,334 ounces, management maintained its full year guidance of 300,000 ounces at an all-in sustaining cost of US$934 per ounce.

SG Fleet Group Ltd (ASX: SGF) shares dropped sharply at the open, but have recovered to be down by 8.5% to $3.81 at the time of writing. According to the salary packaging and fleet management company’s AGM presentation, management expects earnings growth in the range of 20% to 25%. This is far less than the 36% growth that analysts were expecting according to CommSec. This sell-off has made the shares reasonably attractive in my opinion, but not without risk.

Syrah Resources Ltd (ASX: SYR) shares have been hammered and are down over 9% to $3.57 a day after the graphite producer released its quarterly report. It would appear as though the market has taken exception to Syrah increasing its capital expenditure forecast at its Balama mine. Previously capital expenditure was expected to be US$175 million, whereas it has now forecast for it to increase to US$185 million. Although I think Syrah has a bright future, the sudden resignation of its manging director earlier this month is certainly a cause for concern.

If your portfolio took a hit today then these exciting growth shares could be just what you need to give it a lift. Do you own them?

Why These 3 Blue Chip Shares Are Set to Soar for Smart Investors

Discover The Motley Fool's Top 3 blue chips for Smart Investors. These 3 'new breed' shares pay fully franked dividends AND offer the prospect of significant capital appreciation. Simply click here to gain access to this comprehensive FREE investment report.

No credit card required!

HOT OFF THE PRESSES: Motley Fool’s #1 Dividend Pick for 2017!

With its shares up 155% in just the last five years, this ‘under the radar’ consumer favourite is both a hot growth stock AND our expert’s #1 dividend pick for 2017. Now we’re pulling back the curtain for you... And all you have to do to discover the name, code and a full analysis is enter your email below!

Simply enter your email now to receive your copy of our brand-new FREE report, “The Motley Fool’s Top Dividend Stock for 2017.”

By clicking this button, you agree to our Terms of Service and Privacy Policy. We will use your email address only to keep you informed about updates to our website and about other products and services we think might interest you. You can unsubscribe from Take Stock at anytime. Please refer to our https://www.fool.com.au/financial-services-guide">Financial Services Guide (FSG) for more information.

Motley Fool contributor James Mickleboro has no position in any stocks mentioned. The Motley Fool Australia owns shares of A2 Milk. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy. This article contains general investment advice only (under AFSL 400691). Authorised by Bruce Jackson.