RIYADH: Saudi Arabia's main index TASI opened flat yet again as investors continue to monitor the situation in Eastern Europe and as oil price volatility continued. As of Wednesday 10:06 a.m. Saudi time, both TASI and the parallel market, Nomu, started trading flat at 13,093 and 25,021, respectively. Oil prices were on the rise again, with Brent crude up $2.43, trading at