Shares in Fidessa Group have fallen by almost a pound from 1540p at the end of May, prompting Chairman John Hamer to have a little nibble.Hamer spent £15,631 buying 1,078 shares at 1,450p each, a day after FMR LLC, a part of fund management group Fidelity Investments, said it had reduced its stake in the financial software provider to less than 11%, having reduced its holding below 12% just a few days earlier.Hamer's modest purchase topped up his holding in Fidessa to 53,495 shares, representing 0.14% of the issued share capital of the company. Fidessa's shares have been under pressure since the end of April when the company warned that it expects market conditions to remain difficult for some time.Far from drawing in its horns, however, the group plans to step up its spending on product development, as well as its investment in the infrastructure and expertise required to support new business opportunities. Top Director BuysBank of America Corp. (BAC) Director name: Mr Charles K GiffordAmount purchased: 482,794 @ $7.36 Value: $3,553,364New Europe Property Investments (NEPI) Director name: Mr Martin SlabbertAmount purchased: 400,000 @ € 3.28 Value: € 1,312,000New Europe Property Investments (NEPI) Director name: Mr Victor Semionov Amount purchased: 250,000 @ € 3.28 Value: € 820,000Lowland Investment Co (LWI) Director name: Mr Robert RobertsonAmount purchased: 5,000 @ 848.00p Value: £42,400Terrace Hill Group (THG) Director name: Mr Robert F M AdairAmount purchased: 375,000 @ 9.75p Value: £36,562Terrace Hill Group (THG) Director name: Mr Robert F M AdairAmount purchased: 375,000 @ 9.61p Value: £36,038Eden Research (EDEN) Director name: Mr Kenneth Williams BrooksAmount purchased: 190,000 @ 12.92p Value: £24,548Eden Research (EDEN) Director name: Sir Arthur Benjamin Norman GillAmount purchased: 187,000 @ 13.00p Value: £24,310Management Consulting Group (MMC) Director name: Mr Nicholas StaggAmount purchased: 100,000 @ 21.72p Value: £21,720Fidessa Group (FDSA) Director name: Mr John HamerAmount purchased: 1,078 @ 1,450.00p Value: £15,631Top Director SellsHiscox Ltd. (HSX) Director name: Mr Bronek E MasojadaAmount sold: 144,070 @ 408.10p Value: £587,950Wood Group (John) (WG.) Director name: Mr Mark PapworthAmount sold: 53,392 @ 667.00p Value: £356,125Hiscox Ltd. (HSX) Director name: Mr Bronek E MasojadaAmount sold: 33,838 @ 407.00p Value: £137,721Hiscox Ltd. (HSX) Director name: Mr Roberts R S ChildsAmount sold: 33,838 @ 405.27p Value: £137,135Hiscox Ltd. (HSX) Director name: Mr Roberts R S ChildsAmount sold: 33,838 @ 405.20p Value: £137,112Big Yellow Group (BYG) Director name: Mr Nicholas VetchAmount sold: 20,000 @ 286.00p Value: £57,200JH