The S&P/ASX 200 (Index: ^AXJO) (ASX:XJO) has managed to climb slightly higher today, despite some wild share price moves from the plethora of companies reporting their earnings today.

Most sectors are in positive territory, although the telecommunications sector has been dragged down heavily by Telstra Corporation Ltd (ASX: TLS) trading ex-dividend today.

Four other shares that have come under pressure today, include:

Reject Shop Ltd (ASX: TRS)

Shares of the Reject Shop have been slammed today, falling more than 18% after releasing full year results that came in below consensus estimates. As highlighted here, the retailer managed to deliver a significant turnaround from last year and, in the process, increase earnings per share (EPS) by 20%. Nevertheless, investors were clearly expecting a far better result from a company trading on a relatively high valuation multiple and were also perhaps left somewhat disappointed with a fairly vague outlook for FY17. Despite today’s share price decline, the shares have still managed to hold on to a 12-month gain of nearly 48%.

Blackmores Limited (ASX: BKL)

Blackmores shares have plunged more than 17% today, despite the company announcing a 115% increase in full year net profit after tax (NPAT). While the profit result was impressive, investors were left shocked with the weak earnings outlook provided by the company, which warned investors to expect first quarter sales to be lower compared to the prior corresponding period. Blackmores anticipates that sales will improve as the year progresses, but this hasn’t been enough to stop investors heading to the exits.

Slater & Gordon Limited (ASX: SGH)

Shares of the embattled law firm have crashed nearly 10% today after the company announced it expects to book a FY16 full year loss of more than $1 billion. While some investors would have been hoping for a sharp turnaround following Slater & Gordon’s first half loss of $958 million, it appears this is still some time away, with the company expecting to deliver another loss of $59.3 million in the second half. Investors may have also been concerned with the fact that net debt increased by $68.2 million over the year to $682.3 million.

Nearmap Ltd (ASX: NEA)

Shares of the aerial imaging company have plunged more than 15% today after the company reported a widening full year loss on its US operations. While Nearmap’s Australian business continued to deliver strong growth in both revenues and earnings, the US business recorded an EBIT loss of $12 million – up from $6 million the year before. Disappointingly, the company was only able to generate $1 million in sales in the US and it appears investors are beginning to lose patience with Nearmap’s international expansion strategy.

Investors who are unsure of which shares to buy or sell during reporting season need to keep reading...

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Motley Fool contributor Christopher Georges owns shares of Blackmores. The Motley Fool Australia has no position in any of the stocks mentioned. 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.