MORNING BID ASIA-Helter-skelter yen, US tech tonic

Asian stocks should open on Monday buoyed by Friday's tech-led surge on Wall Street, while investors will be scrambling to make sense of the latest twist in the Japanese yen's extraordinary helter-skelter slide against the dollar and other currencies. The yen fell to a fresh 34-year low of 157.79 per dollar on Friday after the Bank of Japan left interest rates on hold, as expected, but failed to signal any meaningful concern about the exchange rate. With the Ministry of Finance still opting not to authorize yen-buying intervention by the BOJ, traders went in full steam.