Early indications suggest that Wall Street stocks may open Friday’s session on a nervous note, as the Greek debt impasse continues. After failing to reach an agreement, Greece and its creditors are set to meet yet again on Saturday to negotiate an agreement. Having rejected a new reform proposal from Greece, the Eurogroup seems to have tabled counter proposals and is coaxing Greece to accept those. The mood across the Atlantic has turned jittery. The dollar is mixed and most commodities are higher, although crude oil futures are modestly lower.